ANSWER KEY 1.1

Answers to Practice Exercises 1.1

Linear Arrangement Exercise:

1. B, 2. D, 3. A, 4. C, 5. B, 6. C, 7. D, 8. B, 9. C, 10. B, 11. C, 12. D, 13. D, 14. A, 15. C

Vertical, Circular, Others Exercise :

1.   B, 2. D, 3. B, 4. A, 5. B, 6. C, 7. A, 8. C, 9. D, 10. A, 11. C, 12. A, 13. B, 14. C, 15. C

Tabular or Grid Based Exercise :

1.   A, 2. B, 3. D, 4. C, 5. C, 6. D, 7. A, 8. C, 9. B, 10. B, 11. B, 12. A, 13. B, 14. D, 15. C

Grouping or Condition Based Exercise :

1.   C, 2. C, 3. D, 4. D, 5. D, 6. A, 7. B, 8. D, 9. D, 10. A, 11. B, 12. C, 13. B, 14. D, 15. A

Blood Relations Exercise Set Based :

1.   C, 2. D, 3. C, 4. D, 5. A, 6. B, 7. B, 8. D, 9. A, 10. C, 11. B, 12. C, 13. B, 14. A, 15. C

Blood Relations Exercise Others :

1.   B, 2. A, 3. C, 4. D, 5. D, 6.  B, 7. A, 8. D, 9. B, 10. A

Coding Decoding Exercise :

1.   A, 2. C, 3. B, 4. B, 5. C, 6. C, 7. A, 8. D, 9. C, 10. C, 11. D, 12. B, 13. C, 14. A, 15. C

Direction Sense Exercise :

1.   D, 2. B, 3. A, 4. B, 5. C, 6. A, 7. D, 8. C, 9. D, 10. A

Series Completion Exercise :

1.   C, 2. D, 3. B, 4. C, 5. A, 6. C, 7. C, 8. D, 9. D, 10. D, 11. A, 12. C, 13. A, 14. C, 15. A

Miscellaneous Exercise :

1.   A, 2. C, 3. B, 4. A, 5. A, 6. D, 7. C, 8. A, 9. C, 10. A, 11. A, 12. C, 13. C, 14. B, 15. D

 Practice Exercises

Level 2

Answers and Explanations :

Exercise 1 : Arrangement Based 1

Set 1 :

1. It is given that the English Book is at the 3^rd position and 2^nd to the left of the Science Book. It means that the Science Book is at position 1 ie the leftmost position in the arrangement.

2. Since there are exactly 2 books between the Science and Sanskrit book, the Sanskrit book is at position 4.

3. Also, the History book is to the immediate right of the Maths book. Therefore, the Maths book must be at position number 6 and History book at position number 5.

4. The Hindi book must be at position number 2.

The Final Arrangement is as follows :

Science x Hindi x English x Sanskrit x History x Maths.

Ans 1 : Option d

Ans 2 : Option a

Ans 3 : Option b

Ans 4 : Option d

Set 2 : General Explanations

1. It is given that Finance, HR and Marketing are located on odd numbered Floors ie Floor numbers 1,3 and 5 in no particular order.

2. The Marketing Department is immediately above the Library while the Finance Department is located somewhere above the HR department. ie both these departments cannot be located on the first floor of the building. Therefore the HR department is on the first floor.

3. Either Marketing or Finance can be on the 3^rd Floor and accordingly, 2 possible arrangements exist.

 Option 1 :         Lab                                           Option 2 :  Acads

                            Finance                                                     Marketing

                            Acads                                                       Library

                            Marketing                                                  Finance

                            Library                                                      Lab

                            HR                                                           HR

Ans 5 : Option d

Ans 6 : Option b

Ans 7 : Option d

Ans 8 : Option a

Set 3 : General Explanations

Let us first indicate the seating arrangement using positions :

There can be 2 cases :

Case 1 : 1. Let the Geography expert be at position 4. Since the Philosophy expert is sitting next to experts who have reviewed Politics and Sociology and the Geography expert has not reviewed Sociology, let the Philosophy expert be at Position 2.

2. Now position 1 and 3 will be occupied by the Science and Sociology expert since neither Pub.Ad. expert nor Politics expert can be seated adjacent to the Philosophy expert. (Condition number 1 in the problem).

3. This further means that Pub. Ad. and Politics expert will have to occupy positions 5 and 6 which in turn will violate condition 1.

Therefore Case 1 cannot be possible.

Case 2 : The Geography expert is at position 4 and the Philosophy expert at Position 5.

1.   The Geography expert must have reviewed Politics and the expert at position 6 must have reviewed Sociology.

2.   This would further indicate that the Politics and Pub.Ad. experts are seated at positions 1 and 3 in no particular order.

3.   It is given that one of the experts sitting in the middle has reviewed philosophy. Since no expert has reviewed his or her own work, therefore the person sitting at Position 2 must have reviewed Philosophy.

4.   The person who has reviewed Geography is sitting on the same side as the Geography expert. This must be the Philosophy expert sitting at Position 5.

5.   The expert at position 6 has reviewed Sociology. Therefore it cannot be the Sociology expert. Also, this position cannot be occupied by either of the Pub.Ad. or Politics experts. This means the person at position 6 must be the Science expert.

6.   Therefore the person at position 2 is the Sociology expert.

The final arrangement would be as follows :

Position 1                        Position 2                        Position 3

Pub. Ad or Politics  Sociology                             Pub.Ad. or Politics

(Science or Pub.Ad.)       (Philosophy)                 (Science or Pub.Ad.)

(Politics)                         (Geography)                             (Sociology)

Geography                      Philosophy                      Science

Position 4                        Position 5                        Position 6

We cannot be sure about the exact positions of the Politics and the Pub. Ad. experts. Also, Information in Brackets is the subjects reviewed by each expert.

Ans 9 : Option a

Ans 10 : Option d

Ans 11 : Option d

Ans 12 : Option c

Set 4 : General Explanations :

Let us first Look at how the arrangement has been done.

1. Let the IB expert be at position 4. Therefore, the Marketing expert will be at position 1

2. Since Q, the IB expert is to the immediate left of the HR expert, therefore the HR expert will be at position 3.

3. It is given that O is the Marketing Expert.

4. Now P cannot be a Marketing or IB expert. Also given that P is not an IT or Finance expert and is sitting opposite to the Operations expert. Therefore P is the HR expert. This would mean that R, the operations expert is at Position 6.

5. The Finance and IT experts are therefore at positions 2 and 5 not in any order. But M is not adjacent to the HR expert. So M is at position 5 and the IT expert N is at position 2.

Ans 13 : Option d

Ans 14 : Option a

Ans 15 : Option b

Ans 16 : Option c

Set 5 : General Explanations :

1. It is given that Q got Rank 1 in Computer Funda while O got Rank 3 in Prog. Basics.

2. Also P got a higher rank than O in Prog. Basics. Since P did not get Rank 1 in any of the 2 subjects, therefore, P must have got Rank 2 in Prog. Basics.

3. M is the only person to get the same Rank in both the Tests. It could be either Rank 4 or 5. But P got a lower Rank than M in Computer Funda. Therefore, M must have got Rank 4 in Computer Funda and so Rank 4 in Prog. Basics as well.

The Partial arrangement of Ranks is as follows:

4. Since M is the only person to get the same Rank in both the Tests, therefore, O cannot get Rank 3 in Comp. Funda. O must have got Rank 2 in Comp. Funda and N must have got Rank 3.

5. Similarly, Q cannot get Rank 1 in Prog. Basics. Q must have got Rank 5 in Prog. Basics and N must have got Rank 1.

Ans 17 : Option b

Ans 18 : Option d

Ans 19 : Option d

Ans 20 : Option c
Arrangement Based 2

Set 1: 1. It is given that A is 4 ranks above E but E is not the lowest scorer in the Test which means that E must not have got Rank 6. The only possibility is E getting Rank 5 and A getting Rank 1.2. C has got Rank 2. Also B and F have got 2 consecutive ranks and therefore they must have got ranks 3 and 4 in no particular order which further means that D must have got the last rank ie Rank 6 among the mentioned students.3. The Final arrangement of students and their ranks is as follows :Rank 1    :        ARank 2    :        ERank 3    :        B or FRank 4    :        B or FRank 5    :        ERank 6    :        DAns 1 : Option dAns 2 : Option bAns 3 : Option c

Set 2 : General ExplanationsIt is given that the Tests have to be scheduled from Monday to Sunday. Also, there has to be a gap of at least 1 day between any 2 slots which means that the Tests have to be scheduled on Monday, Wednesday, Friday and Sunday.a. Maths is the last Test to be conducted and therefore will be scheduled on Sunday.b. Since the English Test cannot be conducted after Thursday, it has to be conducted on either Monday or Wednesday. But if the English Test is scheduled on Wednesday, then Reasoning cannot be scheduled on Monday or Friday. Therefore, the English Test has to be scheduled on Monday.c. If English Test is scheduled on Monday, Reasoning has to be scheduled on Friday and General Knowledge on Wednesday.Ans 4 : Option a. The Tests can be scheduled in only 1 way.Ans 5 : Option cAns 6 : Option b
Set 3 :

From the given conditions, the following can be deduced :

1.   Rakesh and Ritesh are sitting directly opposite each other say at positions 1 and 5 respectively.

2.   Rashmi is sitting 3^rd to the left of Rakesh ie at position 4. This could be either Rakesh’s wife or Ritesh’s daughter.

Case 1 : Rashmi at Position 4 is Rakesh’s wife. Now since it is given that each person sits between 2 people of the opposite gender, therefore, there has to be a male at Position no 6 and it cannot be Ritesh’s son Rahul (as per condition 3 in the given question) . Therefore, it has to be Rakesh’s son Rohan. But this would violate the condition that each child has at least 1 parent as his or her immediate neighbor. Therefore, Case 1 is not correct.

Case 2 : Rashmi at Position 4 must be Ritesh’s daughter. Also, using the logic given above, Rohan must be at Position 6. Now Rohan has at least 1 parent as his immediate neighbor and so Rakesh’s wife Rashmi must be at Position 7.

3.   Rashmi needs to have a lady on her immediate left. It has to be her daughter Raddhika at position no 8.

4.   Position 2 will be Ritesh’s son Rahul and position 3 will be Ritesh’s wife Roshni.

Ans 7 : Option a

Ans 8 : Option d

Ans 9 : Option c

Set 4 : From the conditions given, the following can be deduced

1.   The Dentist lives on the topmost floor i.e floor no 7. Also from condition no 2 of the question, the Businessman must be either on Floor no 3 or Floor no 5. Using the same logic the Engineer and the Teacher must be on any 2 floors out of Floor nos. 2, 4 or 6.

2.   Since, the Teacher had only 1 family as his immediate neighbor, the Teacher must be on Floor no. 2 (The first floor is the recreation club). This would mean that the Doctor is on Floor no 3.

3.   Also, from point no 1 and 2 above, the Businessman must be on Floor no 5.

4.   The Lawyer and the Engineer’s family must be on Floor no 4 and 6 not in any particular order. But the Lawyer has more number of families living above him in the building as compared to the Engineer. Therefore, the Lawyer must be on Floor 4 and the Engineer must be on Floor no. 6.

5.   The Final arrangement is as under :

Floor 7 : Dentist

Floor 6 : Engineer

Floor 5 : Businessman

Floor 4 : Lawyer

Floor 3 : Doctor

Floor 2 : Teacher

Floor 1 : Recreation club.

Ans 10 : Option b

Ans 11 : Option b

Ans 12 : Option c

Set 5 :

Let the 8 positions be as shown in the figure above. Let Astha be at position 1 Since there are 2 people sitting between Astha and Ashish, therefore, Ashish would be at position no. 4

Alok is sitting opposite Ashish and will be at position no. 8. Alok is 2^nd to the right of Ankita. Therefore, Ankita will be at Position no 6. Also, since Atul and Anita occupy adjacent positions they will be at position nos. 2 and 3 in no particular order.

Amit and Anu must be occupying the postions 5 and 7 in no particular order. Further, Astha does not have a girl sitting opposite to her. Therefore, Amit must be at position no 5, while Anu must be at position no 7.

                            Ans 13 : Option d because it could be either Atul or Anita.

Ans 14 : Option b

Position no 6 Ankita and Position no 7 Anu.

Ans 15 : Option a

Ans 16 : Option c

Ankita, Anu, Atul and Anita.

Set 6 : General Explanations

1. Ekalavya is at the extreme right of the arrangement ie at position 5.

2. The person with CE specialization is 2^nd to the right of Dheeraj ie Dheeraj can be seated either at Position 3 or Position 4.

3. Let Dheeraj be at Position 4. Therefore, the person with CE specialization is at Position 2. 

4. Now Bipin cannot be at position 1 or 2 (the person on the immediate left should be EE specialization) or 3 (Bipin cannot have ME as his specialization). Positions 4 and 5 are already occupied.

5. Therefore our assumption of Dheeraj being at Position 4 is incorrect.

6. Let Dheeraj be at Position 3. The person with CE specialization is at position 1. Now there are 2 positions that Bipin can occupy 1 and 4.

7. If Bipin is at Position 4, Ekalavya will have EE specialization. Charu will be at position 2 and Anubhav at Position 1. Now Bipin’s specialization cannot be EE,CE,ME or EC. Also Bipin’s specialization is not CS. This is not possible and so Bipin cannot be at Position 4.

8. Bipin has to be at Position 1 and so the person with EE specialization is at position 2. This person cannot be Charu and so the person at position 2 must be Anubhav. This would mean that Charu is at position 4.

The final positions alongwith specializations is as follows:

Ans 17 : Option c

Ans 18 : Option b

Ans 19 : Option c

Ans 20 : Option a        

      

Arrangements : Non Deterministic 1

Set 1 : The only condition that is certain is that Lakme Fashion Show is scheduled on Thursday. Also, since the Laughter Mania had more events that followed it as compared to those that preceeded it, Laughter Mania must be either on Monday or Thursday.

1.   Metallica concert cannot be the last event scheduled. Therefore, the event on Friday has to be either Dance Night or Quiz Show.

Ans 1 : Option b

If the Metallica concert is scheduled after the Quiz show, the Quiz show cannot be scheduled on Friday and therefore the event scheduled on Friday will be Dance Night.

Ans 2 : Option d

The Quiz Show can be scheduled on any day out of Monday, Wednesday or Friday.

Ans 3 : Option c

All the mentioned events except for Lakme Fashion Show can be scheduled on the first day.

Ans 4 : Option b

Set 2 : General Explanation

1.   There are 6 possible combinations that can be formed but out of these, Kebab only forms a combination with sweets. Therefore the 4 available combinations are

(Kebab, Sweets), (Sweets, South Indian Platter), (Sweets, Chicken Biryani),

(Chicken Biryani, South Indian Platter)

2.   Minaz is not famous for sweets and therefore all the other 3 joints must have sweets in their combination. Also, the item combination in Minaz must be (Chicken Biryani and South Indian Platter).

3.   The outlet in Najafgarh specializes in Kebabs and Sweets. It cannot be Rakims or Kawala Inn. The Outlet in Najafgarh must be Chaldiram.

4.   Rakims is located at Pantheon Road.

The partial table looks as follows :

1.   Minaz    :Chicken Biryani, South Indian Platter : Bada Baazar or Rasoipur

2.   Chaldiram :Kebabs and Sweets : Najafgarh

3.   Rakims :Chicken Biryani, Sweets or South Indian Platter, Sweets : Pantheon

4.   Kawala Inn : Chicken Biryani, Sweets or South Indian Platter, Sweets : Bada Baazar or Rasoipur.

Ans 5 : Option b

Ans 6 : Option a

If Kawala Inn is located at Rasoipur, it has to specialise in South Indian Platter and Sweets since one of the 2 locations where South Indian Platter is famous is Rasoipur(Given). This would mean that Rakims will be known for Chicken Biryani and Sweets.

Ans 7 : Option d

Bada Baazar or Rasoipur.

Ans 8 : Option a

Set 3 : Let us first decide the way these people are seated to play the game.

1. It is given that C started the Game and is at Position 3. Therefore, as per the given priority, C must have passed the parcel to the person at Position number 7.

2. Now person at Position 7 cannot use priority 1 and give it back to C otherwise the game will end. This person must therefore use priority 2 ie pass it to the person sitting 2 places to the right ie to the person at Position 5.

3. Since H is the 3^rd one to receive the parcel, H will be at position number 5. Now H will have to use the 1^st priority and pass it to the person sitting at Position number 1 ie B

4. The person at Position Number 1 will have to use the 3^rd Priority and pass it to the person to the immediate right ie Position Number 8 ie E.

5. Person at Position Number 8 will have to pass it to the person at position number 4 which is G.

6. Person at position number 4 will pass it to person at position number 2.

7. Person at Position Number 2 will finally pass it to the person at position number 6.

Ans 9  : Option d

Ans 10 : Option b

A and F can be persons at position numbers 7 , 6 or 2. Since there are exactly 3 people sitting between A and F, therefore A and F will be at positions 2 and 6 in no particular order. ie the person at Position number 7 (opposite to C) will be D.

Ans 11 : Option b

If A gets the parcel sometime before H, A will be the 2^nd one to get the parcel. Also, if D gets it immediately after G, D is the 7^th person to get the parcel which in turn means that F is the last one to get the parcel.

Ans 12 : Option b

Set 4 : General Explanations

1. Mohit must have got position number 3. Also, Pramod must have got either position number 1 or 2.

2. Okif finished exactly 2 positions ahead of Nitin but Nitin was not ranked 5^th. Also, Nitin cannot be at Rank 3 since Mohit has got Rank 3. Therefore, Nitin must be at Rank 4 which means that Okif must be at rank 2 and Pramod at Rank 1.

3. Lucky must have therefore got Rank 5.

4. First Rank is Pramod Bansal.

5. Verma got a better rank than Gupta but lower than Okif. This would mean that Okif is either Aggarwal or Sharma.

Ans 13 : Option b

Okif’s Surname must be Sharma.

Ans 14 : Option d

If there is a gap of 2 positions between Sharma and Verma, it is only possible if Okif is Sharma. Therefore, Verma must be at position 5 but as per the given conditions, Verma cannot be the last one to finish as Verma got a better Rank than Gupta. Therefore statement 2 is definitely False. Statement 1 may be true.

Ans 15 : Option d

It could be either Sharma, Aggarwal or Gupta.

Ans 16 : Option a

Since the gap between Bansal and Mohit is exactly 1 Rank, the gap between Aggarwal and Gupta is also 1 Rank. Therefore, Okif must be Aggarwal and the person at the 4^th position ie Nitin must be Gupta.

Set 5 : General Explanations :

In this problem, there can be 2 basic conditions based on whether Infogain or Infy is the first company to visit Campus.

Let Infy be the first Company to visit.

1.   If Infy visits on Monday, the Company testing in .Net will not visit before Wednesday ie it will visit either on Wednesday, Thursday or Friday.

2.   Cogni visits on Thursday and will test the skills in either Database or C. Also, The company testing in Datastructure will vist on Friday. Therefore, the company testing in .Net will visit on Wednesday.

3.  Accen tests the skills in C++ and so it will visit on Tuesday.

The partial data for this case can be compiled as follows :

Now let us look at the second case. Let Infogain be the first company to visit

1. If Infogain visits on Monday, Accen will visit immediately before Infy. Since Cogni is on Thursday, it would mean that Accen will visit on Tuesday and Infy on Wednesday. This would further lead to Wipro visiting on Friday.

The partial data for this case can be compiled as follows:

Based on this data, let us try to answer the questions

Ans 17 : Option d

Ans 18 : Option b

In both the cases, it can be seen that Accen will visit on Tuesday.

Ans 19 : Option d

If Wipro is certain to visit on the last day, we are definitely talking about the 2^nd case ie Infy will visit on Wednesday but we cannot be sure about the additional skills tested.

Ans 20 : Option b

From the first case, we can see that if Infy visits on Monday, the company testing in .Net will visit on Wednesday.

[contd.]