RRB NTPC 2021-07-04-2021-1 RRB Question Paper

RRB NTPC 2021 - Graduate Level and Undergraduate Level Question Papers

RRB NTPC 2021-07-04-2021-1 RRB Questions

1.
Four letter-pairs have been given, out of which three are alike in some manner and one is different. Select the odd one.
A.
NY
B.
BL
C.
LW
D.
CN
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ANSWER :
B. BL
2.
Identify the Indian batsman who scored three consecutive test centuries in his first three International Cricket test matches.
A.
Mohammad Azharuddin
B.
Sachin Tendulkar
C.
Virat Kohli
D.
Rahul Dravid
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ANSWER :
A. Mohammad Azharuddin
3.
A locomotive engine without any wagon can go at a speed of 50 km per hour and its speed diminishes by a quantity which varies as the square root of the number of wagons attached. If with 25 wagons its speed is 35 km per hour, then what is the greatest number of wagons that can be attached, if the speed is NOT to fall below 11 km per hour?
A.
169
B.
144
C.
196
D.
225
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ANSWER :
A. 169
4.
Three of the options given share a certain relationship while the fourth is different. Select the option that is different from the rest.
A.
343
B.
125
C.
27
D.
81
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ANSWER :
D. 81
5.
The sum of two positive numbers is 27, while the difference of their squares is 81. What is the value of the greater of the two numbers?
A.
16
B.
14
C.
12
D.
15
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ANSWER :
D. 15
6.
The chord of contact of tangents drawn from a point on the circle x² + y² = a² to the circle x² + y² = b² touches the circle x² + y² = c² such that b^m = a^n * c^p, where m, n, p ∈ N. Find the value of m + n + p + 10.
A.
8
B.
10
C.
14
D.
12
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ANSWER :
C. 14
7.
A circle has a radius of 3 units and its centre lies on the line y = x – 1. Find the equation of the circle if it passes through point (7, 3).
A.
x² + y² − 8x − 6y − 16 = 0
B.
x² + y² − 8x − 6y + 16 = 0
C.
x² + y² + 8x + 6y + 16 = 0
D.
x² + y² + 8x − 6y + 16 = 0
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ANSWER :
B. x² + y² − 8x − 6y + 16 = 0
8.
Find the fourth proportional to 3, 5 and 15.
A.
25
B.
20
C.
35
D.
15
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ANSWER :
A. 25
9.

If A's salary is 50% more than that of B, then by what percentage is B's salary less than that of A?

A.

23 \( \frac{1}{3} \) %

B.

13 \( \frac{1}{3} \)  %

C.

33 \( \frac{1}{3} \)  %

D.

30 \( \frac{1}{3} \)  %

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ANSWER :

C. 33 \( \frac{1}{3} \)  %

10.
Which gas can be fixed in the atmosphere by lightning?
A.
Carbon dioxide
B.
Argon
C.
Nitrogen
D.
Oxygen
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ANSWER :
C. Nitrogen