RRB NTPC Exam Questions and Answers 2021
The product of two numbers is 24 times the difference of these two numbers. If the sum of these two numbers is 14. Find the larger number?
(A) 9
(B) 11
(C) 7
(D) 8
Correct Answer : D
In a division sum, the divisor is ten times the quotient and five times the remainder. If the remainder is 46, find the dividend.
(A) 5336
(B) 5391
(C) 5388
(D) 5343
Correct Answer : A
The length, breadth and height of a hall are 144 m, 180 m and 384 m respectively. The length of the longest scale that can measure the three dimensions of the hall exactly is:
(A) 30 m
(B) 12 m
(C) 15 m
(D) 25 m
Correct Answer : B
In an alloy, the ratio of copper and zinc is 7 : 6. If 1,450 gm. of zinc mixed with in 14 kg 300gm. of an alloy, then the ratio of copper and zinc will be
(A) 26:27
(B) 22: 23
(C) 23:26
(D) 25: 21
Correct Answer : B
When a positive integer n is divided by 5 the remainder is 2. What is the remainder when the number 3n is is divided by 5 ?
(A) 2
(B) 1
(C) 4
(D) 3
Correct Answer : B
D and E are midpoints of side AB and AC respectively of the ΔABC. A line drawn from A meets BC at H and DE at K. AK : KH = ?
(A) 1 : 1
(B) 1: 2
(C) 2 : 1
(D) 3 : 2
Correct Answer : A
A person lent certain sum of money at 5% per annum simple interest and in 15 years the interest amounted to Rs 250 less than the sum lent. What was the sum lent (in Rs)?
(A) 1500
(B) 1000
(C) 3000
(D) 2000
Correct Answer : B
The simple and compound interest that can be earned in two years at the same rate is Rs 1500 and Rs 1575 respectively. What is the rate (% per annum) of interest?
(A) 12.5%
(B) 20%
(C) 10%
(D) 5%
Correct Answer : C
If sec x + cos x = 2, then the value of sec16 x + cos16 x will be-
(A) 2
(B) 0
(C) 1
(D) √3
Correct Answer : A
What is the simplified value of (1– sin A cos A)(sin A + cos A)?
(A) $$cos^2A – sin^2A$$
(B) 0
(C) $$sin^3A + cos^3A$$
(D) $$sin^2A – cos^2A$$
Correct Answer : C
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Vikram Singh
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