# CAT LR Scheduling Questions PDF [Most Important]

**Scheduling **is one of the important topics in the **CAT** **LRDI **section. These questions are can be challenging, so ensure that you are aware of the **Important ways to represent and solve ‘Scheduling’ Sets in LRDI**. Solve & practice more questions from CAT Scheduling LRDI so that you get a hang of these questions. You can check out these CAT Scheduling LRDI questions from the **CAT Previous year papers**. In this post, we will look into some important Scheduling LRDI Questions for CAT. These are a good source of practice for CAT preparation; If you want to practice these questions, you can download these Important **Scheduling LRDI Questions for CAT** (with detailed answers) **PDF** along with the video solutions below, which is completely Free.

Download LR Scheduling Questions for CAT

Enroll for CAT 2022 Crash Course

**Instructions**

A journal plans to publish 18 research papers, written by eight authors (A, B, C, D, E, F, G, and H) in four issues of the journal scheduled in January, April, July and October. Each of theÂ research papers was written by exactly one of the eight authors. Five papers were scheduled in each of the first two issues, while four were scheduled in each of the last two issues. EveryÂ author wrote at least one paper and at most three papers. The total number of papers written by A, D, G and H was double the total number of papers written by the other four authors. Four of the authors were from India and two each were from Japan and China. Each author belonged to exactly one of the three areas â€” Manufacturing, Automation, and Logistics. Four of the authors were from the Logistics area and two were from the Automation area. As per the journal policy, none of the authors could have more than one paper in any issue of the journal.

The following facts are also known.

1. F, an Indian author from the Logistics area, wrote only one paper. It was scheduled in the October issue.

2. A was from the Automation area and did not have a paper scheduled in the October issue.

3. None of the Indian authors were from the Manufacturing area and none of the Japanese or Chinese authors were from the Automation area.

4. A and H were from different countries, but had their papers scheduled in exactly the same issues.

5. C and E, both Chinese authors from different areas, had the same number of papers scheduled. Further, E had papers scheduled in consecutive issues of the journal but C did not.

6. B, from the Logistics area, had a paper scheduled in the April issue of the journal.

7. B and G belonged to the same country. None of their papers were scheduled in the same issue of the journal.

8. D, a Japanese author from the Manufacturing area, did not have a paper scheduled in the July issue.

9. C and H belonged to different areas.

**Question 1:Â **Which of the following is the correct sequence of number of papers by authors from Automation, Manufacturing and Logistics areas, respectively?

a)Â 6, 5, 7

b)Â 6, 6, 6

c)Â 6, 7, 5

d)Â 5, 6, 7

**1)Â AnswerÂ (A)**

**Solution:**

In the information, it is provided that there are four authors in the logistics department, 2 authors in automation, and 2 authors in manufacturing. There are 4 Indian authors, 2 Chinese authors, and 2 Japanese authors.

The total issues publicized were 18 of which the publications done by A, D, G, H are twice the papers written by the other four authors. Hence A+D+G+H has written 12 papers in total and B+C+E+F has written 6 in total. Since an author can write a minimum of 4 papers and a maximum of 3 papers. Each of A, D, G, H must have written 3 papers each.

In statement 3 it was provided that none of the Indian authors were from the Manufacturing area and none of the Japanese or Chinese authors were from the Automation area.

Since none of the Japanese and Chinese authors belonged to automation. Hence the two automation authors must be from India. In statement 1 it was given that F an Indian author is from logistics.

Of the remaining 5 authors 3 from logistics and 2 from manufacturing, in statement 5 it is given that the two Chinese authors are from different areas and hence they must be from manufacturing and logistics.

Of the remaining 3 authors 2 in logistics and 1 in manufacturing, in statement 8 is given that a Japanese author belonged to manufacturing, and hence of the remaining 2 in logistics one of them was from India and the other from Japan.

Of the four Indian authors, 2 belonged to logistics and 2 automation. Of the two authors from Japan, one belonged to manufacturing and one logistics. Of the two Chinese authors, one of them belonged to logistics and the other manufacturing.

Five papers were scheduled in each of the January and April issues, while four were scheduled in each of July and October issues.

Using statement 1, F an Indian author wrote a single paper in logistics published in October.

Using statement 2, A was from Automation and did not have a paper scheduled in October. Since A wrote 3 papers in total he must have written in the other three months and since only Indian authors worked in Automation he must have been from India.

Using statement 5, C, E are Chinese and wrote an equal number of papers. Since B+C+E+F have written a total of 6 papers. The two possibilities are 2+2+1+1 or 3+1+1+1.. Since it was given that E had papers scheduled in consecutive issues and C did not. So the only possible case is C = 2, E =2, F = 1, B = 1.

Using statement 4, A and H were from different countries and wrote papers in the same months. Hence H must be Japanese and must have written in Jan, April, July.

In statement 6, B, from the Logistics area, had a paper scheduled in the April issue of the journal.

In statement 7, B and G belonged to the same country. None of their papers were scheduled in the same issue of the journal. Since B and G belonged to the same country the only possibility is that both of them belonged to the same country and since they published Journals in different months. G must have published in January, July, and October.

In statement 8, D, a Japanese author from the Manufacturing area, did not have a paper scheduled in the July issue. Hence he must have had the three issues in Jan, April, Oct. The other Japanese author H must have written in logistics.

The fourth Indian author G must have written a paper in Automation.

In January, one more paper needs to be publicized, one in April, 1 in July, and one in October.

In statement 5, E had papers scheduled in consecutive issues of the journal but C did not.

Hence C must have written in Jan and October, and E in April and July.

In statement 9, C and H belonged to different areas. Hence C must be from Manufacturing and E must be from Logistics.

In Automation, there are a total of 6 papers, Logistics 7 papers, and Manufacturing a total of 5 papers.

**Question 2:Â **Which of the following statements is FALSE?

a)Â There were exactly two papers by authors from Manufacturing area in the January issue.

b)Â There was exactly one paper by an author from Manufacturing area in the April issue.

c)Â There was exactly one paper by an author from Logistics area in the October issue.

d)Â There were exactly two papers by authors from Manufacturing area in the July issue.

**2)Â AnswerÂ (D)**

**Solution:**

In the information, it is provided that there are four authors in the logistics department, 2 authors in automation, and 2 authors in manufacturing. There are 4 Indian authors, 2 Chinese authors, and 2 Japanese authors.

The total issues publicized were 18 of which the publications done by A, D, G, H are twice the papers written by the other four authors. Hence A+D+G+H has written 12 papers in total and B+C+E+F has written 6 in total. Since an author can write a minimum of 4 papers and a maximum of 3 papers. Each of A, D, G, H must have written 3 papers each.

In statement 3 it was provided that none of the Indian authors were from the Manufacturing area and none of the Japanese or Chinese authors were from the Automation area.

Since none of the Japanese and Chinese authors belonged to automation. Hence the two automation authors must be from India. In statement 1 it was given that F an Indian author is from logistics.

Of the remaining 5 authors 3 from logistics and 2 from manufacturing, in statement 5 it is given that the two Chinese authors are from different areas and hence they must be from manufacturing and logistics.

Of the remaining 3 authors 2 in logistics and 1 in manufacturing, in statement 8 is given that a Japanese author belonged to manufacturing, and hence of the remaining 2 in logistics one of them was from India and the other from Japan.

Of the four Indian authors, 2 belonged to logistics and 2 automation. Of the two authors from Japan, one belonged to manufacturing and one logistics. Of the two Chinese authors, one of them belonged to logistics and the other manufacturing.

Five papers were scheduled in each of the January and April issues, while four were scheduled in each of July and October issues.

Using statement 1, F an Indian author wrote a single paper in logistics published in October.

Using statement 2, A was from Automation and did not have a paper scheduled in October. Since A wrote 3 papers in total he must have written in the other three months and since only Indian authors worked in Automation he must have been from India.

Using statement 5, C, E are Chinese and wrote an equal number of papers. Since B+C+E+F have written a total of 6 papers. The two possibilities are 2+2+1+1 or 3+1+1+1.. Since it was given that E had papers scheduled in consecutive issues and C did not. So the only possible case is C = 2, E =2, F = 1, B = 1.

Using statement 4, A and H were from different countries and wrote papers in the same months. Hence H must be Japanese and must have written in Jan, April, July.

In statement 6, B, from the Logistics area, had a paper scheduled in the April issue of the journal.

In statement 7, B and G belonged to the same country. None of their papers were scheduled in the same issue of the journal. Since B and G belonged to the same country the only possibility is that both of them belonged to the same country and since they published Journals in different months. G must have published in January, July, and October.

In statement 8, D, a Japanese author from the Manufacturing area, did not have a paper scheduled in the July issue. Hence he must have had the three issues in Jan, April, Oct. The other Japanese author H must have written in logistics.

The fourth Indian author G must have written a paper in Automation.

In January, one more paper needs to be publicized, one in April, 1 in July, and one in October.

In statement 5, E had papers scheduled in consecutive issues of the journal but C did not.

Hence C must have written in Jan and October, and E in April and July.

In statement 9, C and H belonged to different areas. Hence C must be from Manufacturing and E must be from Logistics.

There are no authors from Manufacturing in the July issue and hence option D is false.

**Question 3:Â **Which of the following statements is FALSE?

a)Â Every issue had at least one paper by author(s) from Automation area.

b)Â Every issue had exactly one paper by a Chinese author.

c)Â Every issue had exactly two papers by authors from Logistics area.

d)Â Every issue had exactly two papers by Indian authors.

**3)Â AnswerÂ (C)**

**Solution:**

In the information, it is provided that there are four authors in the logistics department, 2 authors in automation, and 2 authors in manufacturing. There are 4 Indian authors, 2 Chinese authors, and 2 Japanese authors.

The total issues publicized were 18 of which the publications done by A, D, G, H are twice the papers written by the other four authors. Hence A+D+G+H has written 12 papers in total and B+C+E+F has written 6 in total. Since an author can write a minimum of 4 papers and a maximum of 3 papers. Each of A, D, G, H must have written 3 papers each.

In statement 3 it was provided that none of the Indian authors were from the Manufacturing area and none of the Japanese or Chinese authors were from the Automation area.

Since none of the Japanese and Chinese authors belonged to automation. Hence the two automation authors must be from India. In statement 1 it was given that F an Indian author is from logistics.

Of the remaining 5 authors 3 from logistics and 2 from manufacturing, in statement 5 it is given that the two Chinese authors are from different areas and hence they must be from manufacturing and logistics.

Of the remaining 3 authors 2 in logistics and 1 in manufacturing, in statement 8 is given that a Japanese author belonged to manufacturing, and hence of the remaining 2 in logistics one of them was from India and the other from Japan.

Of the four Indian authors, 2 belonged to logistics and 2 automation. Of the two authors from Japan, one belonged to manufacturing and one logistics. Of the two Chinese authors, one of them belonged to logistics and the other manufacturing.

Five papers were scheduled in each of the January and April issues, while four were scheduled in each of July and October issues.

Using statement 1, F an Indian author wrote a single paper in logistics published in October.

Using statement 2, A was from Automation and did not have a paper scheduled in October. Since A wrote 3 papers in total he must have written in the other three months and since only Indian authors worked in Automation he must have been from India.

Using statement 5, C, E are Chinese and wrote an equal number of papers. Since B+C+E+F have written a total of 6 papers. The two possibilities are 2+2+1+1 or 3+1+1+1.. Since it was given that E had papers scheduled in consecutive issues and C did not. So the only possible case is C = 2, E =2, F = 1, B = 1.

Using statement 4, A and H were from different countries and wrote papers in the same months. Hence H must be Japanese and must have written in Jan, April, July.

In statement 6, B, from the Logistics area, had a paper scheduled in the April issue of the journal.

In statement 7, B and G belonged to the same country. None of their papers were scheduled in the same issue of the journal. Since B and G belonged to the same country the only possibility is that both of them belonged to the same country and since they published Journals in different months. G must have published in January, July, and October.

In statement 8, D, a Japanese author from the Manufacturing area, did not have a paper scheduled in the July issue. Hence he must have had the three issues in Jan, April, Oct. The other Japanese author H must have written in logistics.

The fourth Indian author G must have written a paper in Automation.

In January, one more paper needs to be publicized, one in April, 1 in July, and one in October.

In statement 5, E had papers scheduled in consecutive issues of the journal but C did not.

Hence C must have written in Jan and October, and E in April and July.

In statement 9, C and H belonged to different areas. Hence C must be from Manufacturing and E must be from Logistics.

.Option C is false in the issue of April there were three authors from logistics department.

**Question 4:Â **Which of the following statement(s) MUST be true?

Statement A: Every issue had at least one paper by author(s) from each country.

Statement B: Every issue had at most two papers by author(s) from each area.

a)Â Both the statements

b)Â Only Statement B

c)Â Only Statement A

d)Â Neither of the statements

**4)Â AnswerÂ (C)**

**Solution:**

Using statement 1, F an Indian author wrote a single paper in logistics published in October.

In statement 6, B, from the Logistics area, had a paper scheduled in the April issue of the journal.

The fourth Indian author G must have written a paper in Automation.

In statement 5, E had papers scheduled in consecutive issues of the journal but C did not.

Hence C must have written in Jan and October, and E in April and July.

The publication of April has three authors from logistics. Hence false

**Question 5:Â **How many papers were written by Indian authors?

**5)Â Answer:Â 8**

**Solution:**

Using statement 1, F an Indian author wrote a single paper in logistics published in October.

In statement 6, B, from the Logistics area, had a paper scheduled in the April issue of the journal.

The fourth Indian author G must have written a paper in Automation.

In statement 5, E had papers scheduled in consecutive issues of the journal but C did not.

Hence C must have written in Jan and October, and E in April and July.

Indian authors wrote a total of 3+1+1+3 = 8 papers

Checkout: **CAT Free Practice Questions and Videos**

**Question 6:Â **What is the correct sequence of number of papers written by B, C, E and G, respectively?

a)Â 1, 2, 2, 3

b)Â 1, 3, 3, 1

c)Â 3, 1, 1, 3

d)Â 1, 2, 2, 1

**6)Â AnswerÂ (A)**

**Solution:**

Using statement 1, F an Indian author wrote a single paper in logistics published in October.

In statement 6, B, from the Logistics area, had a paper scheduled in the April issue of the journal.

The fourth Indian author G must have written a paper in Automation.

In statement 5, E had papers scheduled in consecutive issues of the journal but C did not.

Hence C must have written in Jan and October, and E in April and July.

.Number of papers written by B, C, E, and G are: 1, 2, 2, 3

**Instructions**

The Humanities department of a college is planning to organize eight seminars, one for eachÂ of the eight doctoral students – A, B, C, D, E, F, G and H. Four of them are from Economics,Â three from Sociology and one from Anthropology department. Each student is guided by oneÂ among P, Q, R, S and T. Two students are guided by each of P, R and T, while one student isÂ guided by each of Q and S. Each student is guided by a guide belonging to their department.Â Each seminar is to be scheduled in one of four consecutive 30-minute slots starting at 9:00Â am, 9:30 am, 10:00 am and 10:30 am on the same day. More than one seminars can beÂ scheduled in a slot, provided the guide is free. Only three rooms are available and hence atÂ the most three seminars can be scheduled in a slot. Students who are guided by the sameÂ guide must be scheduled in consecutive slots.

The following additional facts are also known.

1. Seminars by students from Economics are scheduled in each of the four slots.

2. Aâ€™s is the only seminar that is scheduled at 10:00 am. A is guided by R.

3. F is an Anthropology student whose seminar is scheduled at 10:30 am.

4. The seminar of a Sociology student is scheduled at 9:00 am.

5. B and G are both Sociology students, whose seminars are scheduled in the same slot. TheÂ seminar of an Economics student, who is guided by T, is also scheduled in the same slot.

6. P, who is guiding both B and C, has students scheduled in the first two slots.

7. A and G are scheduled in two consecutive slots.

**Question 7:Â **If D is scheduled in the slot immediately before Qâ€™s, then which of the following is NOTÂ necessarily true?

a)Â G is guided by Q.

b)Â E is guided by R.

c)Â F is guided by S.

d)Â D is guided by T.

**7)Â AnswerÂ (B)**

**Solution:**

Now D is scheduled in the slot immediately before Q. In that case Q will be in the 9:30 slot and D will be in the 9:00 am slot. Hence D will be mentored by T and one of E/H will be mentoredÂ by R and the other by T. Obviously E is guided by R is not necessarily true as he can be mentored by T also.

**Question 8:Â **If E and Q are both scheduled in the same slot, then which of the following statementsÂ BEST describes the relationship between D, H, and T?

a)Â Exactly one of D and H is guided by T.

b)Â Both D and H are guided by T.

c)Â At least one of D and H is guided by T.

d)Â Neither D nor H is guided by T.

**8)Â AnswerÂ (C)**

**Solution:**

If E and Q are scheduled in the same slot, they both can be in the last slot. In that case E will be guided by R and both D and H will be guided by T.Â Moreover if they are in the second slot, E will be guided by T and atleast one of D and H will be guided by T. Hence option (c) is correct

**Question 9:Â **If D is scheduled in a slot later than Q’s, then which of the following two statement(s)Â is(are) true?

(i) E and H are guided by T.

(ii) G is guided by Q.

a)Â Only (ii)

b)Â Neither (i) nor (ii)

c)Â Only (i)

d)Â Both (i) and (ii)

**9)Â AnswerÂ (D)**

**Solution:**

Now D is scheduled in a slot later than Q. Q can mentor only F or G, but obviously he can’t mentor F because F is in the last slot, hence Q will mentor G. In that scenario D has to take the 10:30 slot which means D willÂ be mentored by R and E/H will be mentored by T. So statement 1 and statement 2 both are correct.

**Question 10:Â **Which of the following statements is necessarily true?

a)Â Q is guiding G.

b)Â H is an Economics student.

c)Â S is guiding F.

d)Â B is scheduled in the first slot.

**10)Â AnswerÂ (B)**

**Solution:**

As we can clearly say from here that H/D/E are all economics students. Hence Option B is definitely correct

**Question 11:Â **Who all are NOT guiding any Economics students?

a)Â Q, R and S

b)Â P, Q and R

c)Â P, R and S

d)Â P, Q and S

**11)Â AnswerÂ (D)**

**Solution:**

Let’s look at all the students we have A,B,C,D,E,F,G,H. The guides are P,Q,R,S,T and they mentor 2,1,2,1,2 students respectively.

Slots are 9:00,9:30,10:00,10:30 . Moreover economics, sociology and anthropology have 4,3,1 students respectively.

Now from 5th statement, two sociology seminars and economics seminars are held in the same slot. This will not take place at 10:00(only one seminar is scheduled at 10:00), this will also not take place at 10:30( An anthropology seminar is scheduled at 10:30 and maximum three seminars are scheduled in a slot. Hence this will happen at either 9 or 9:30. Now from (7) A and G are scheduled in consecutive slots. A is scheduled at 10:00. Hence G will be scheduled at 9:30. SO from (5), there will be three students having their seminars at 9:30.

Combining this data with the remaining points we get the following table

Moreover we do know that students having same subject are scheduled in consecutive slots. So we get

As we can see from the above table, P,Q and S are not guiding any economics student

**Question 12:Â **Which one of the following statements is true?

a)Â Two seminars are scheduled in the first slot.

b)Â Only one seminar is scheduled in the second slot.

c)Â Three seminars are scheduled in the first slot.

d)Â Three seminars are scheduled in the last slot.

**12)Â AnswerÂ (A)**

**Solution:**

Let’s look at all the students we have A,B,C,D,E,F,G,H. The guides are P,Q,R,S,T and they mentor 2,1,2,1,2 students respectively.

Slots are 9:00,9:30,10:00,10:30 . Moreover economics, sociology and anthropology have 4,3,1 students respectively.

Now from 5th statement, two sociology seminars and economics seminars are held in the same slot. This will not take place at 10:00(only one seminar is scheduled at 10:00), this will also not take place at 10:30( An anthropology seminar is scheduled at 10:30 and maximum three seminars are scheduled in a slot. Hence this will happen at either 9 or 9:30. Now from (7) A and G are scheduled in consecutive slots. A is scheduled at 10:00. Hence G will be scheduled at 9:30. SO from (5), there will be three students having their seminars at 9:30.

Combining this data with the remaining points we get the following table

Moreover we do know that students having same subject are scheduled in consecutive slots. So we get

Here we can see that two seminars are scheduled in first slot.