RRB NTPC CBT 2 Level 6 May-2-2022 Shift 1 Exam Previous Question Paper with Solutions

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81) If 23.5% of a number is 11.75, then what is the number?

A) 50
B) 60
C) 40
D) 48

View Answer

A) 50

Explanation:We are given that 23.5% of a number is 11.75, and we need to find the number.
Let the number be ( x ).
We can express 23.5% of $( x )$ as:
23.5\% × x = 11.75
Converting 23.5% into a decimal:
$23.5\% = \frac{23.5}{100} = 0.235$
Now, the equation becomes:
0.235 × x = 11.75
To solve for ( x ), divide both sides of the equation by 0.235:
$x = \frac{11.75}{0.235}$
x = 50
So, the number is 50.

82) Eight people E. H, M, P, S. T. Y and Z are sitting in a straight line. All of them are facing North. E sits fourth from one of the extreme ends of the line. H sits third to the right of E. As many people sit to the right of H as to the left of M. Only one person sits between M and P. S sits to the immediate right of Z. Only one person sits between Z and T.How many people sit to the left of Y?

A) Two
B) Three
C) One
D) None

View Answer

C) One

83) Refer to the given letter, number, symbol series and answer the question that follows.
(Left) K L % Y & 4 E 2 * 3 M & 7 S W # 8 2 H * L (Right)
If all the numbers are dropped from the series, which of the following will be eighth from the right?

A) M
B) &
C) *
D) E

View Answer

A) M

Explanation:Let’s break down the given series and solve the problem step-by-step:
Left Series:
K L % Y & 4 E 2 * 3 M & 7 S W # 8 2 H * L
Right Series (after removing numbers):
K L % Y & E * M & S W # H * L
Steps:
Remove all the numbers from the series:
Numbers: 4, 2, 3, 7, 8, 2
After removing numbers, we get:
K L % Y & E * M & S W # H * L
Now, we need to find the eighth element from the right in this new series:
The series is: K L % Y & E * M & S W # H * L
Counting from the right:
Conclusion:
The eighth element from the right is M.

84) Which of the following is the SI unit of electric charge and is equivalent to the charge contained in nearly 6 × 10¹⁸ electrons?

A) Coulomb
B) Siemens
C) Becquerel
D) Henry

View Answer

A) Coulomb

85) One-seventh of a 2-digit number is 15 less than half of the number. What is the sum of the digits of the 2-digit number?

A) 8
B) 5
C) 7
D) 6

View Answer

D) 6

Explanation:Let’s denote the 2-digit number as ( x ), where ( x ) can be expressed in terms of its digits. Suppose the tens digit is ( a ) and the ones digit is ( b ), so the number can be written as:
x = 10a + b
Given:
– One-seventh of the number is 15 less than half of the number.
– We can write this as the equation:
$\frac{x}{7} = \frac{x}{2} - 15$
Step 1: Solve for ( x )
We will solve the equation step by step:
Start by eliminating the fractions. Multiply the entire equation by 14 (the least common multiple of 7 and 2):
$14 × \frac{x}{7} = 14 × \left( \frac{x}{2} - 15 \right)$
2x = 7x – 210
Now, isolate ( x ) on one side:
2x – 7x = -210
-5x = -210
Solve for ( x ):
$x = \frac{-210}{-5} = 42$
Step 2: Find the sum of the digits
The number ( x ) is 42, so the tens digit ( a = 4 ) and the ones digit ( b = 2 ). The sum of the digits is:
4 + 2 = 6