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CAT 2022 Slot 1 — DILR questions with answers
All 20 questions of the Data Interpretation & Logical Reasoning section (14 MCQs, 6 TITA, 4 sets). Try each one, then open its answer and solution.
CAT 2022 Slot 1, timed like the real exam (120 minutes, 40 a section) and scored the CAT way: +3 right, −1 for a wrong MCQ, 0 for a wrong TITA, with the full post-mock analysis. Older official papers are in CATin Pro, with 80+ mocks and the full planner. The last three years of papers are free.
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Data Interpretation & Logical Reasoning
CAT 2022 Slot 1 · 40 minutes · +3 for a right answer, −1 for a wrong MCQ, 0 for a wrong TITA
Data set
Set for questions 25–29
DIRECTIONS for questions 25-29:
The following facts are known about the goals scored by these four players only. All the questions refer only to the goals scored by these four players.
The management of a university hockey team was evaluating performance of four women players - Amla, Bimla, Harita and Sarita for their possible selection in the university team for next year. For this purpose, the management was looking at the number of goals scored by them in the past 8 matches, numbered 1 through 8. The four players together had scored a total of 12 goals in these matches. In the 8 matches, each of them had scored at least one goal. No two players had scored the same total number of goals.
1. Only one goal was scored in every even numbered match.
2. Harita scored more goals than Bimla.
3. The highest goal scorer scored goals in exactly 3 matches including Match 4 and Match 8.
4. Bimla scored a goal in Match 1 and one each in three other consecutive matches.
5. An equal number of goals were scored in Match 3 and Match 7, which was different from the number of goals scored in either Match 1 or Match 5.
6. The match in which the highest number of goals was scored was unique and it was not Match 5.
Q25MCQLogical Puzzles
How many goals were scored in Match 7?
- A3
- B2
- C1
- DCannot be determined
Answer and solution
Answer: (C) 1
Four different positive totals summing to 12:
or
. Bimla scored in Match 1 and three other consecutive matches, so she has 4; Harita has more, so 5. Amla and Sarita have 1 and 2 in some order.
Harita scored in exactly 3 matches, including 4 and 8. Even matches had one goal each, so she scored 1 in each and 3 in an odd match. Bimla's run avoids Matches 4 and 8, so it is 5, 6, 7.
Let Matches 3 and 7 have
goals each, and Matches 1 and 5 have
and
; odd matches hold
goals, so
. Harita's 3 goals cannot be in Match 7 (
leaves nothing for
), Match 3 (
,
: Matches 3 and 7 tie as highest) or Match 5 (it would be highest). So they are in Match 1:
, so
,
,
.
Amla and Sarita score one goal each in Matches 2, 3 and 5.

So Match 7 had only Bimla's goal. Option B (2) is Match 5's total, and option D fails because the number of goals in every match, including Match 7, is fixed. Hence, option C (1).
Q26MCQLogical Puzzles
Which of the following is the correct sequence of goals scored in matches 1, 3, 5 and 7?
- A5, 1, 0, 1
- B3, 1, 2, 1
- C3, 2, 1, 2
- D4, 1, 2, 1
Answer and solution
Answer: (D) 4, 1, 2, 1
Four different positive totals summing to 12:
or
. Bimla scored in Match 1 and three other consecutive matches, so she has 4; Harita has more, so 5. Amla and Sarita have 1 and 2 in some order.
Harita scored in exactly 3 matches, including 4 and 8. Even matches had one goal each, so she scored 1 in each and 3 in an odd match. Bimla's run avoids Matches 4 and 8, so it is 5, 6, 7.
Let Matches 3 and 7 have
goals each, and Matches 1 and 5 have
and
; odd matches hold
goals, so
. Harita's 3 goals cannot be in Match 7 (
leaves nothing for
), Match 3 (
,
: Matches 3 and 7 tie as highest) or Match 5 (it would be highest). So they are in Match 1:
, so
,
,
.
Amla and Sarita score one goal each in Matches 2, 3 and 5.

So Matches 1, 3, 5 and 7 had 4, 1, 2 and 1 goals. Option B (3, 1, 2, 1) counts only Harita's 3 goals in Match 1 and misses Bimla's. Hence, option D (4, 1, 2, 1).
Q27MCQLogical Puzzles
Which of the following statement(s) is/are true?
Statement-1: Amla and Sarita never scored goals in the same match.
Statement-2: Harita and Sarita never scored goals in the same match.
- AStatement-1 only
- BStatement-2 only
- CBoth the statements
- DNone of the statements
Answer and solution
Answer: (C) Both the statements
Four different positive totals summing to 12:
or
. Bimla scored in Match 1 and three other consecutive matches, so she has 4; Harita has more, so 5. Amla and Sarita have 1 and 2 in some order.
Harita scored in exactly 3 matches, including 4 and 8. Even matches had one goal each, so she scored 1 in each and 3 in an odd match. Bimla's run avoids Matches 4 and 8, so it is 5, 6, 7.
Let Matches 3 and 7 have
goals each, and Matches 1 and 5 have
and
; odd matches hold
goals, so
. Harita's 3 goals cannot be in Match 7 (
leaves nothing for
), Match 3 (
,
: Matches 3 and 7 tie as highest) or Match 5 (it would be highest). So they are in Match 1:
, so
,
,
.
Amla and Sarita score one goal each in Matches 2, 3 and 5.

Statement 1: Matches 2, 3 and 5 each have exactly one goal from Amla or Sarita, so they never scored together. Statement 2: Harita scored only in Matches 1, 4 and 8, where Sarita did not. Both are true, so option A fails. Hence, option C (Both the statements).
Q28MCQLogical Puzzles
Which of the following statement(s) is/are false?
Statement-1: In every match at least one player scored a goal.
Statement-2: No two players scored goals in the same number of matches.
- ANone of the statements
- BStatement-1 only
- CBoth the statements
- DStatement-2 only
Answer and solution
Answer: (A) None of the statements
Four different positive totals summing to 12:
or
. Bimla scored in Match 1 and three other consecutive matches, so she has 4; Harita has more, so 5. Amla and Sarita have 1 and 2 in some order.
Harita scored in exactly 3 matches, including 4 and 8. Even matches had one goal each, so she scored 1 in each and 3 in an odd match. Bimla's run avoids Matches 4 and 8, so it is 5, 6, 7.
Let Matches 3 and 7 have
goals each, and Matches 1 and 5 have
and
; odd matches hold
goals, so
. Harita's 3 goals cannot be in Match 7 (
leaves nothing for
), Match 3 (
,
: Matches 3 and 7 tie as highest) or Match 5 (it would be highest). So they are in Match 1:
, so
,
,
.
Amla and Sarita score one goal each in Matches 2, 3 and 5.

Statement 1: every match had at least one goal, so it is true. Statement 2: Bimla scored in 4 matches, Harita in 3, and Amla and Sarita in 1 and 2, all different, so it is true. Neither is false; option D fails because Statement 2 holds. Hence, option A (None of the statements).
Q29MCQLogical Puzzles
If Harita scored goals in one more match as compared to Sarita, which of the following statement(s) is/are necessarily true?
Statement-1: Amla scored goals in consecutive matches.
Statement-2: Sarita scored goals in consecutive matches.
- AStatement-2 only
- BNone of the statements
- CStatement-1 only
- DBoth the statements
Answer and solution
Answer: (B) None of the statements
Four different positive totals summing to 12:
or
. Bimla scored in Match 1 and three other consecutive matches, so she has 4; Harita has more, so 5. Amla and Sarita have 1 and 2 in some order.
Harita scored in exactly 3 matches, including 4 and 8. Even matches had one goal each, so she scored 1 in each and 3 in an odd match. Bimla's run avoids Matches 4 and 8, so it is 5, 6, 7.
Let Matches 3 and 7 have
goals each, and Matches 1 and 5 have
and
; odd matches hold
goals, so
. Harita's 3 goals cannot be in Match 7 (
leaves nothing for
), Match 3 (
,
: Matches 3 and 7 tie as highest) or Match 5 (it would be highest). So they are in Match 1:
, so
,
,
.
Amla and Sarita score one goal each in Matches 2, 3 and 5.

Harita scored in 3 matches, so Sarita scored in 2 (2 goals) and Amla in 1. Amla scored in one match only, so Statement 1 is false. Sarita's matches may be 2 and 3, or 2 and 5, or 3 and 5, so Statement 2 need not hold; option A fails. Hence, option B (None of the statements).
Data set
Set for questions 30–34
DIRECTIONS for questions 30-34:
There are 15 girls and some boys among the graduating students in a class. They are planning a get-together, which can be either a 1-day event, or a 2-day event, or a 3-day event. There are 6 singers in the class, 4 of them are boys. There are 10 dancers in the class, 4 of them are girls. No dancer in the class is a singer.
Some students are not interested in attending the get-together. Those students who are interested in attending a 3-day event are also interested in attending a 2-day event; those who are interested in attending a 2-day event are also interested in attending a 1-day event.
The following facts are also known:
1. All the girls and 80% of the boys are interested in attending a 1-day event. 60% of the boys are interested in attending a 2-day event.
2. Some of the girls are interested in attending a 1-day event, but not a 2-day event; some of the other girls are interested in attending both.
3. 70% of the boys who are interested in attending a 2-day event are neither singers nor dancers. 60% of the girls who are interested in attending a 2-day event are neither singers nor dancers.
4. No girl is interested in attending a 3-day event. All male singers and 2 of the dancers are interested in attending a 3-day event.
5. The number of singers interested in attending a 2-day event is one more than the number of dancers interested in attending a 2-day event.
Q30TITASet Theory
How many boys are there in the class?
Type in your answer (TITA). No negative mark for a wrong answer.
Answer and solution
Answer: 50
Of the 6 singers, 4 are boys and 2 girls; of the 10 dancers, 6 are boys and 4 girls. With
boys,
want the 2-day event, and
of them,
, are neither singers nor dancers. That leaves
singers or dancers.
All 4 male singers want the 3-day event, so the 2-day event too. The 2 dancers wanting the 3-day event must be boys, as no girl wants it. So
male dancers want the 2-day event, which is 2 to 6:
, so
.
must be a whole number, so
is a multiple of 50. The only such value in range is
. Then 40 boys want the 1-day event and 30 the 2-day event (21 neither, 4 singers, 5 dancers).

The answer is 50.
Q31MCQSet Theory
Which of the following can be determined from the given information?
I. The number of boys who are interested in attending a 1-day event and are neither dancers nor singers.
II. The number of female dancers who are interested in attending a 1-day event.
- AOnly I
- BNeither I nor II
- COnly II
- DBoth I and II
Answer and solution
Answer: (C) Only II
Boys include 4 singers and 6 dancers, since 2 singers and 4 dancers are girls. With
boys,
want the 2-day event and
of these are neither, leaving
: the 4 male singers (they want the 3-day event) plus
male dancers. The 2 dancers wanting the 3-day event are boys, so this is 2 to 6, giving
. As
is whole,
: 40 boys want the 1-day event and 30 the 2-day event, 5 of them dancers.

I: the 40 boys wanting the 1-day event are the 4 singers, the 5 dancers above, possibly the sixth dancer, and 30 or 31 boys who are neither. Nothing fixes which, so I cannot be determined.
II: every girl wants the 1-day event, so all 4 female dancers do. II is determined.
Option D fails because I is not fixed. Hence, option C (Only II).
Q32MCQSet Theory
What fraction of the class are interested in attending a 2-day event?
- A7/10
- B7/13
- C9/13
- D2/3
Answer and solution
Answer: (B) 7/13
Boys include 4 singers and 6 dancers, since 2 singers and 4 dancers are girls. With
boys,
want the 2-day event and
of these are neither, leaving
: the 4 male singers (they want the 3-day event) plus
male dancers. The 2 dancers wanting the 3-day event are boys, so this is 2 to 6, giving
. As
is whole,
: 40 boys want the 1-day event and 30 the 2-day event, 5 of them dancers.
Let
girls want the 2-day event, with
as some girls do and some do not.
of them are neither, so
is a multiple of 5; the other
are
singers and
dancers. Statement 5 gives
, so
. Only 2 girls sing, so
,
,
and
.

So
of the
students want the 2-day event:
. Option C would need 45 such students. Hence, option B (7/13).
Q33MCQSet Theory
What BEST can be concluded about the number of male dancers who are interested in attending a 1-day event?
- A5 or 6
- B6
- C5
- D4 or 6
Answer and solution
Answer: (A) 5 or 6
Boys include 4 singers and 6 dancers, since 2 singers and 4 dancers are girls. With
boys,
want the 2-day event and
of these are neither, leaving
: the 4 male singers (they want the 3-day event) plus
male dancers. The 2 dancers wanting the 3-day event are boys, so this is 2 to 6, giving
. As
is whole,
: 40 boys want the 1-day event and 30 the 2-day event, 5 of them dancers.

Anyone wanting the 2-day event also wants the 1-day event, so these 5 male dancers want the 1-day event. The sixth male dancer may or may not: the other boys wanting the 1-day event can be 30 or 31 who are neither, and no condition decides it. So the number is 5 or 6.
Options B and C each claim a single value the data does not fix. Hence, option A (5 or 6).
Q34MCQSet Theory
How many female dancers are interested in attending a 2-day event?
- A2
- B1
- C0
- DCannot be determined
Answer and solution
Answer: (C) 0
Boys include 4 singers and 6 dancers, since 2 singers and 4 dancers are girls. With
boys,
want the 2-day event and
of these are neither, leaving
: the 4 male singers (they want the 3-day event) plus
male dancers. The 2 dancers wanting the 3-day event are boys, so this is 2 to 6, giving
. As
is whole,
: 40 boys want the 1-day event and 30 the 2-day event, 5 of them dancers.
Let
girls want the 2-day event, with
as some girls do and some do not.
of them are neither, so
is a multiple of 5; the other
are
singers and
dancers. Statement 5 gives
, so
. Only 2 girls sing, so
,
,
and
.

So no female dancer wants the 2-day event, and option B (1) is ruled out by
. Hence, option C (0).
Data set
Set for questions 35–39
DIRECTIONS for questions 35-39:
Comprehension:
Adhara, Bithi, Chhaya, Dhanavi, Esther, and Fathima are the interviewers in a process that awards funding for new initiatives. Every interviewer individually interviews each of the candidates individually and awards a token only if she recommends funding. A token has a face value of 2, 3, 5, 7, 11, or 13. Each interviewer awards tokens of a single face value only.
Once all six interviews are over for a candidate, the candidate receives a funding that is Rs.1000 times the product of the face values of all the tokens. For example, if a candidate has tokens with face values 2, 5, and 7, then they get a funding of Rs.1000 × (2 × 5 × 7) = Rs.70,000.
Pragnyaa, Qahira, Rasheeda, Smera, and Tantra were five candidates who received funding. The funds they received, in descending order, were Rs.390,000, Rs.210,000, Rs.165,000, Rs.77,000, and Rs.66,000.
The following additional facts are known:
1. Fathima awarded tokens to everyone except Qahira, while Adhara awarded tokens to no one except Pragnyaa.
2. Rashida received the highest number of tokens that anyone received, but she did not receive one from Esther.
3. Bithi awarded a token to Smera but not to Qahira, while Dhanavi awarded a token to Qahira but not to Smera.
Q35TITALogical Puzzles
How many tokens did Qahira receive?
Type in your answer (TITA). No negative mark for a wrong answer.
Answer and solution
Answer: 2
In thousands:
,
,
,
and
. All six values occur, so each interviewer uses a different one. Value 3 occurs 4 times; 2, 5 and 11 three times each; 7 twice; 13 once.
Fathima gave 4 tokens, so her value is 3, and Qahira, whose amount alone lacks a 3, got Rs.77,000. Adhara gave one token, so her value is 13 and Pragnyaa got Rs.390,000. Rasheeda has the most tokens (four), so she got Rs.210,000. Esther gave her none, so Esther's value is not 2, 3, 5 or 7: it is 11. Dhanavi gave to Qahira (
), so her value is 7, and Bithi and Chhaya have 2 and 5 in some order. Smera and Tantra got Rs.165,000 and Rs.66,000 in some order.

Qahira's Rs.77,000
came from Dhanavi and Esther only.
The answer is 2.
Q36MCQLogical Puzzles
Who among the following definitely received a token from Bithi but not from Dhanavi?
- APragnyaa
- BRasheeda
- CQahira
- DTantra
Answer and solution
Answer: (A) Pragnyaa
In thousands:
,
,
,
and
. All six values occur, so each interviewer uses a different one. Value 3 occurs 4 times; 2, 5 and 11 three times each; 7 twice; 13 once.
Fathima gave 4 tokens, so her value is 3, and Qahira, whose amount alone lacks a 3, got Rs.77,000. Adhara gave one token, so her value is 13 and Pragnyaa got Rs.390,000. Rasheeda has the most tokens (four), so she got Rs.210,000. Esther gave her none, so Esther's value is not 2, 3, 5 or 7: it is 11. Dhanavi gave to Qahira (
), so her value is 7, and Bithi and Chhaya have 2 and 5 in some order. Smera and Tantra got Rs.165,000 and Rs.66,000 in some order.

Dhanavi (7) gave only to Qahira and Rasheeda. Pragnyaa's amount has both 2 and 5, so she got Bithi's token whatever Bithi's value, and it has no 7. Rasheeda (option B) got Dhanavi's token; Qahira has neither 2 nor 5; Bithi's value is the one in Smera's amount, which Tantra's amount lacks. Hence, option A (Pragnyaa).
Q37TITALogical Puzzles
How many tokens did Chhaya award?
Type in your answer (TITA). No negative mark for a wrong answer.
Answer and solution
Answer: 3
In thousands:
,
,
,
and
. All six values occur, so each interviewer uses a different one. Value 3 occurs 4 times; 2, 5 and 11 three times each; 7 twice; 13 once.
Fathima gave 4 tokens, so her value is 3, and Qahira, whose amount alone lacks a 3, got Rs.77,000. Adhara gave one token, so her value is 13 and Pragnyaa got Rs.390,000. Rasheeda has the most tokens (four), so she got Rs.210,000. Esther gave her none, so Esther's value is not 2, 3, 5 or 7: it is 11. Dhanavi gave to Qahira (
), so her value is 7, and Bithi and Chhaya have 2 and 5 in some order. Smera and Tantra got Rs.165,000 and Rs.66,000 in some order.

Chhaya's value is 2 or 5. Value 2 occurs in 390, 210 and 66; value 5 in 390, 210 and 165. Either way she awarded 3 tokens.
The answer is 3.
Q38TITALogical Puzzles
How many tokens did Smera receive?
Type in your answer (TITA). No negative mark for a wrong answer.
Answer and solution
Answer: 3
In thousands:
,
,
,
and
. All six values occur, so each interviewer uses a different one. Value 3 occurs 4 times; 2, 5 and 11 three times each; 7 twice; 13 once.
Fathima gave 4 tokens, so her value is 3, and Qahira, whose amount alone lacks a 3, got Rs.77,000. Adhara gave one token, so her value is 13 and Pragnyaa got Rs.390,000. Rasheeda has the most tokens (four), so she got Rs.210,000. Esther gave her none, so Esther's value is not 2, 3, 5 or 7: it is 11. Dhanavi gave to Qahira (
), so her value is 7, and Bithi and Chhaya have 2 and 5 in some order. Smera and Tantra got Rs.165,000 and Rs.66,000 in some order.

Smera got Rs.165,000 (
) or Rs.66,000 (
). Each is a product of three values, so either way she received 3 tokens.
The answer is 3.
Q39MCQLogical Puzzles
Which of the following could be the amount of funding that Tantra received? (a) Rs. 66,000 (b) Rs. 165,000
- ANeither (a) nor (b)
- BOnly (b)
- COnly (a)
- DBoth (a) and (b)
Answer and solution
Answer: (D) Both (a) and (b)
In thousands:
,
,
,
and
. All six values occur, so each interviewer uses a different one. Value 3 occurs 4 times; 2, 5 and 11 three times each; 7 twice; 13 once.
Fathima gave 4 tokens, so her value is 3, and Qahira, whose amount alone lacks a 3, got Rs.77,000. Adhara gave one token, so her value is 13 and Pragnyaa got Rs.390,000. Rasheeda has the most tokens (four), so she got Rs.210,000. Esther gave her none, so Esther's value is not 2, 3, 5 or 7: it is 11. Dhanavi gave to Qahira (
), so her value is 7, and Bithi and Chhaya have 2 and 5 in some order. Smera and Tantra got Rs.165,000 and Rs.66,000 in some order.

Bithi gave Smera a token, so Bithi's value is 5 if Smera got Rs.165,000 and 2 if she got Rs.66,000, with Chhaya taking the other. Both arrangements meet every condition, so Tantra could have got Rs.66,000 or Rs.165,000. Options B and C each miss a valid case. Hence, option D (Both (a) and (b)).
Data set
Set for questions 40–44
DIRECTIONS for questions 40-44:
Given above is the schematic map of the metro lines in a city with rectangles denoting terminal stations (e.g. A), diamonds denoting junction stations (e.g. R) and small filled-up circles denoting other stations. Each train runs either in east-west or north-south direction, but not both. All trains stop for 2 minutes at each of the junction stations on the way and for 1 minute at each of the other stations. It takes 2 minutes to reach the next station for trains going in east-west direction and 3 minutes to reach the next station for trains going in northsouth direction. From each terminal station, the first train starts at 6 am; the last trains leave the terminal stations at midnight. Otherwise, during the service hours, there are metro service every 15 minutes in the north-south lines and every 10 minutes in the east-west lines. A train must rest for at least 15 minutes after completing a trip at the terminal station, before it can undertake the next trip in the reverse direction. (All questions are related to this metro service only. Assume that if someone reaches a station exactly at the time a train is supposed to leave, (s)he can catch that train.)

Q40MCQNetworks & Routes
If Hari is ready to board a train at 8:05 am from station M, then when is the earliest that he can reach station N?
- A9:11 am
- B9:06 am
- C9:01 am
- D9:13 am
Answer and solution
Answer: (A) 9:11 am
Trains leave M every 10 minutes from 6:00 am, so at 8:00, 8:10 and so on. No train leaves at 8:05, so Hari's earliest train leaves M at 8:10 am.
Between M and N there are 19 stations: 3 before R, 9 between R and S, and 5 after S. So there are 20 gaps, each 2 minutes east-west:
minutes.
The train stops 2 minutes at each of the 2 junctions, R and S, and 1 minute at each of the other 17 stations:
minutes.
Journey time
minutes, so Hari reaches N at 8:10 am + 61 minutes = 9:11 am.
Option B (9:06 am) assumes a train leaves at 8:05, which none does. Hence, option A (9:11 am).
Q41MCQNetworks & Routes
If Priya is ready to board a train at 10:25 am from station T, then when is the earliest that she can reach station S?
- A11:12 am
- B11:22 am
- C11:07 am
- D11:28 am
Answer and solution
Answer: (A) 11:12 am
Priya can go T to R to S (north, then east) or T to V to S (east, then north).
Via R: northbound trains from B take
minutes to reach T and wait 2 minutes, so they leave T at 6:13, 6:28, and so on. She catches the 10:28 am train. T to R is 4 gaps and 3 stops:
minutes, reaching R at 10:43. Eastbound trains from M take
minutes to reach R and leave it at 6:13, 6:23, and so on, so one leaves at 10:43 and she catches it. R to S is 10 gaps and 9 stops:
minutes, reaching S at 11:12 am.
Via V: eastbound trains from P also take 11 minutes to reach T and leave it at 6:13, 6:23, and so on; she catches the 10:33 and, 29 minutes later, reaches V at 11:02. Northbound trains from D likewise leave V at 6:13, 6:28, and so on, so the next is 11:13, reaching S 15 minutes later, at 11:28 am.
Option D (11:28 am) is the slower route via V. Hence, option A (11:12 am).
Q42MCQNetworks & Routes
Haripriya is expected to reach station S late. What is the latest time by which she must be ready to board at station S if she must reach station B before 1 am via station R?
- A11:39 pm
- B11:49 am
- C11:35 pm
- D11:43 pm
Answer and solution
Answer: (A) 11:39 pm
Via R, Haripriya rides west from S to R, then south from R to B.
Southbound trains leave A every 15 minutes, the last at midnight. A to R takes
minutes and the train waits 2 minutes at junction R, so the last one leaves R at 12:13 am. From R to B it covers 7 gaps (
minutes) and stops at T (2 minutes) and 5 other stations (5 minutes): 28 minutes, reaching B at 12:41 am, before 1 am. So she must reach R by 12:13 am.
S to R is 10 gaps and 9 stops:
minutes, so she must leave S by 11:44 pm.
Westbound trains from N take
minutes to reach S and wait 2 minutes, so they leave S at 6:19, 6:29, and so on: at 11:39 pm and 11:49 pm. The 11:49 pm train reaches R at 12:18 am, too late.
If she is ready at 11:43 pm (option D), the next train is 11:49 pm and she misses the connection. Hence, option A (11:39 pm).
Q43TITANetworks & Routes
What is the minimum number of trains that are required to provide the service on the AB line (considering both north and south directions)?
Type in your answer (TITA). No negative mark for a wrong answer.
Answer and solution
Answer: 8
On the A to B line a train passes 9 intermediate stations: 2 junctions (R and T) and 7 others. A trip takes
minutes.
A train leaving A at 6:00 am reaches B at 6:41 am and must rest 15 minutes, so it is ready at 6:56 am. Trains leave B every 15 minutes (6:00, 6:15, and so on), so its earliest return trip is at 7:00 am. It reaches A at 7:41 am and leaves again at 8:00 am.
So each train leaves A once every 120 minutes. With a train leaving A every 15 minutes, the line needs
trains: 4 start at A (6:00 to 6:45) and 4 at B, and from 7:00 am the returning trains take over.
The answer is 8.
Q44TITANetworks & Routes
What is the minimum number of trains that are required to provide the service in this city?
Type in your answer (TITA). No negative mark for a wrong answer.
Answer and solution
Answer: 48
North-south lines (A to B, C to D): a trip passes 2 junctions and 7 other stations, taking
minutes. A train leaving at 6:00 am is ready again at 6:56 am, so it returns on the 7:00 am departure. It leaves the same terminal every 120 minutes, and trains leave every 15 minutes, so each line needs
trains: 16 for both.
East-west lines (M to N, P to Q): a trip passes 2 junctions and 17 other stations, taking
minutes. A train leaving at 6:00 am arrives at 7:01 am and is ready at 7:16 am; trains leave every 10 minutes, so it returns at 7:20 am and is back to leave again at 8:40 am. It leaves the same terminal every 160 minutes, so each line needs
trains: 32 for both.
Total
trains.
The answer is 48.