RRB NTPC 2021-19-03-2021-2 RRB Question Paper

RRB NTPC 2021 - Graduate Level and Undergraduate Level Question Papers

RRB NTPC 2021-19-03-2021-2 RRB Questions

41.
From a circular sheet of radius 20 cm, three circles of radius 6 cm each are cut off. What is the ratio of the area of uncut to the area of the cut portion?
A.
73 : 37
B.
73 : 25
C.
73 : 23
D.
73 : 27
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ANSWER :
D. 73 : 27
42.
The least five-digit number which is exactly divisible by 9, 12 and 15 is:
A.
10050
B.
10060
C.
10090
D.
10080
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ANSWER :
D. 10080
43.
Which of the following publishes the Red List of Threatened Species?
A.
WWF
B.
WNO
C.
UNEP
D.
IUCN
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ANSWER :
D. IUCN
44.
Find the value of (?) in the following.
(a² − b²) : (a² − ab) :: (a³ + b³) : ?
A.
a(a² + 2b² − ab)
B.
a(a² + b² − 2ab)
C.
a(a² + b² − ab)
D.
a²(a + b − 2ab)
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ANSWER :
C. a(a² + b² − ab)
45.
What is the height of the Allahabad pillar which bears inscriptions associated with Samudragupta?
A.
40 feet
B.
35 feet
C.
30 feet
D.
25 feet
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ANSWER :
B. 35 feet
46.
What is the average percentage of energy that can be transferred from one trophic level to another trophic level in a food chain?
A.
1
B.
5
C.
10
D.
50
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ANSWER :
C. 10
47.
The Indo-American scientist Har Gobind Khorana won the Nobel prize for his contribution in ________.
A.
mathematics
B.
physics
C.
genetics
D.
chemistry
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ANSWER :
C. genetics
48.
A, B and C complete a task in 8 days. A or B alone can complete the same task in 20 days. In how many days can C alone complete the same task?
A.
35
B.
30
C.
40
D.
45
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ANSWER :
C. 40
49.
If A exceeds B by 30% and B is less than C by 20%, then A : C is:
A.
25 : 26
B.
26 : 25
C.
25 : 52
D.
10 : 13
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ANSWER :
B. 26 : 25
50.

IBM 370 was a _____ generation computer.

A.

3rd

B.

2nd

C.

1st

D.

4th

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ANSWER :

A. 3rd