Puzzle – Railway Reasoning (Part- 1)

Total Questions: 50

11. There are six persons, A,B,C,D,E and F. A,B,C and F are male and other two are female. The height of A is 5.2 feet, B is 5.7 feets , C is 5.9 feet, D is 5.4 feet, E is 6.0 feet and F is 6.1 feet. Out of these all,A,B,C and E like sugar. And D and F like salt. Persons who have a height of more than 5.5 feet wear black , and others wear white. [NTPC CBT II Level 3 (14/06/2022) Shift 1]

Who among these is the sugar-loving male who does NOT wear black?

Correct Answer: (b) A
Solution:

A = 5.2 Feet - Sugar - White - Male
B = 5.7 Feet - Sugar - Black - Male
C = 5.9 Feet - Sugar - Black - Male
D = 5.4 Feet - Salt - White - Female
E = 6.0 Feet - Sugar - Black - Female
F = 6.1 Feet - Salt - Black - Male
“A” is the sugar loving male who doesn’t wear black.

12. Five containers of different shapes: sphere, cube, prism, cuboid and cylinder have different patterns: plain, checkered, floral, polka dots and strips but not necessarily in the same order. Also each has a different colour blue, green, pink, black and yellow but not necessarily in the same order. [NTPC CBT II Level 3 (14/06/2022) Shift 2]

The cube and cylinder don’t have floral design. Sphere is pink in colour. Prism has checkered design but is not yellow or black in colour. Cuboid is green in colour but doesn’t have polka dots or stripes pattern. The plain container is pink in colour. Cube has polka dots and neither blue nor black in colour. Cylinder is not blue in colour.
Which container has floral pattern?

Correct Answer: (a) Cuboid
Solution:

Cube - Floral(no) Polka(yes) blue(no) black(no)
Cylinder - Floral(no) blue(no)
Sphere - Pink(yes) Plain(yes)
Prism - Checkered(yes) yellow(no) black(no)
Cuboid - Green (yes) Polka(no) Stripes(no)
Cube, sphere, and prism have different patterns and cylinder doesn’t have a floral pattern.
So, cuboid has floral pattern.

13. There are four friends Sharayu, Pinky, Tanisha and Mamta. Two study in J college, one each in X college and A college. Each one is definitely good at one subject and one is good at all the subjects. The subjects are English, Science, Maths and Computer. Of those studying in J college, one is good at Maths and the other in all subjects. Tanisha is studying in A college. Pinky is good at Maths. Sharayu is not good at Science. [NTPC CBT - I 28/12/2020 (Evening)]

Find who is good at all the subjects.

Correct Answer: (d) Mamta
Solution:

There are two students studying in J college. One is good at math and the other one is good at all subjects. Pinky is good at math so she is in J college. Tanisha is studying in A college. Now Sharayu is not good at Science, so she can’t be in J college. So, the only person left is Mamta Mamta ⇒ is in J college and is good at all subjects.

14. Seven chocolates A, B, C, D, E, F and G are bought at different costs between Rs.40 and Rs.50 (excluding 40 and 50) but not necessarily in the same order. The cost of chocolate C is five less than that of chocolate E. The cost of chocolate A is a prime number. The cost of Chocolate F is two more than that of chocolate A. The cost of Chocolate F is more than that of chocolate E. The cost of chocolate D is an odd number. The cost of chocolate G is three more than the cost of chocolate D. None of the chocolates costs Rs.44. The cost of chocolate B is an even number. Which of the following chocolates is costlier than E? [NTPC CBT - I 29/12/2020 (Morning)]

Correct Answer: (c) G
Solution:

Let the prices of the chocolates A, B, C, D, E, F, G have possible values : 41, 42, 43, 45, 46, 47, 48, 49 (not necessarily in the same order) Given information, C = E - 5, F = A + 2, G = D + 3, and A = prime, D = odd, F > E > C, None is 44, B = even and G>D Considering all the above criteria we can say A can only be 47, otherwise if we take A = 41 or 43 the value of C will be less than 40. ⇒ F = A + 2 = 49
⇒ E = 46 (as F > E) C = E - 5 = 41
⇒ D = 45 (D is odd) G = D + 3 = 48
⇒ B = 42 (B is even) So, from the given options we can say G is costlier chocolate than E.

15. A team is to be selected from 13 players P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12 and P13. There will be seven players in the team. P2 cannot be selected with P1, P6 or P4. P7 cannot be selected with P2, P10, P11 or P13. If P8 and P13 both are selected, then P5 must be selected. P4 cannot be selected with P2, P6, P12 or P11. [NTPC CBT - I 05/01/2021 (Morning)]

Which of the following is a connected selection of the team?

Correct Answer: (b) P1, P3, P4, P5, P8, P9, P13
Solution:

From the given instructions, we can summarize that if P7 is in the team then P13 cannot be selected for the team, also if P4 is in the team then P2, P6, P12, P11 cannot be selected for the team. In option (a)→ P1, P3, P4, P5, P6, P8, P9 → P4 and P6 are together, so it is wrong. In option (c)→ P2, P3, P5, P7, P8, P9, P13 → P7 and P13 are together, so it is wrong. In option (d)→ P1, P6, P11, P12, P13, P3, P4 → again P4 and P6 are together, so it is wrong. Then the only option (b) which is correct, is: P1, P3, P4, P5, P8, P9, P13.

16. Five students Radha. Sujit,Mihir, Anshul and Vikas have a total of five books on the subjects of Accountancy, Business Studies, Mathematics, Economics and English written by authors Jain, Kohli, Das, Shanna and Edwin. Each student has only one book on one of the five subjects. [NTPC CBT - I 07/01/2021 (Morning)]

● Jain is the author of the Accountancy book. which is not owned by Vikas or Radha
● Anshul owns the book written by Edwin
● Mihir owns the Mathematics book.
● Vikas has the English book, which is not written by Kohli
● The Economics books are written by Sharma Identify the author of the business studies book.

Correct Answer: (b) Edwin
Solution:
AUTHORSRADHASUJITMIHIRANSHULVIKASBOOKS
JAINX√XXXACCOUNTS
KOHLIXX√XXMATHEMATIC
DASXXXX√ENGLISH
SHARMA√XXXXECONOMICS
EDWINXXX√XBUSINESS

So, from the above chart, we can say that the author of the business studies book is Edwin and it is owned by Anshul.

17. There is a group of six persons, A, B, C, D, E, and F in a room. In the group, there are two married couples. B is Italian and is the mother of C. F is the grandmother of C. F is from canada. D is the grandfather of E and D is from Australia. There is one Italian, one Canadian, one Australian, one French and two Irish people in the group. The French person is male and is married. Nobody who is a grandchild is married. What is the nationality of A and who is his wife? [NTPC CBT - I 07/01/2021 (Evening) ]

Correct Answer: (b) French, B
Solution:

18. What is the smallest number of birds that could fly in the formation described below, assuming that each bird is counted only once to fulfil all the conditions listed? Two birds in front of a bird, two birds behind a bird and a bird between two birds. [NTPC CBT - I 09/01/2021 (Evening)]

Correct Answer: (a) 5
Solution:

Smallest no.of birds = 5

19. A man asked a boy, “Tell me a number which is greater than ‘4’ but less than ‘9’. Also it should be greater than ‘7’ but less than ‘11’, The number is: [NTPC CBT - I 13/01/2021 (Evening)]

Correct Answer: (a) 8
Solution:

The number is greater than ‘4’ but less than ‘9’. ⇒( 9 > 𝑁 > 4 )
Also it should be greater than ‘7’ but less
than ‘11’ ⇒( 11 > 𝑁 > 7 )
It means: 9 > 𝑁 > 7
So, the number is 8.

20. There is a 6- storey building with 20 rooms on each floor. Some toxic material is concealed in the building . There groups of officers start the search operation simultaneously. The first group searches the 1st and 2nd floors.The second group handles the 3rd and 4th floors. The third group takes over the 5th and 6th floors. If it takes 1 minute to reach any nearest floor and 1 minute to search each room, how much time will it take to complete the entire search operation? [NTPC CBT - I 16/01/2021 (Morning)]

Correct Answer: (d) 46 min
Solution:

The room searched by each team = 40. Time to search 40 rooms = 40 min. In 40 min each team completed 40 rooms of two floors. And Time to take to go each floor = 1 min , For 6 floor = 6 min
Total time taken = 40 + 6 = 46 min.