Railway RRB / NTPC — MCQ Practice Questions & Answers

Question 1

What is 15% of 240?

Accepted Answer

Correct answer: A. 36 — To find a percentage of a number, multiply the number by the percentage expressed as a decimal: 15\% 	ext{ of } 240 = 0.15 	imes 240 . Step 1: Convert percentage to decimal Convert 15% to its decimal form: 15\% = \frac{15}{100} = 0.15 Step 2: Multiply by the base number 0.15 	imes 240 = 36 Alternatively, using fractions: \frac{15}{100} 	imes 240 = \frac{15 	imes 240}{100} = \frac{3600}{100} = 36 **Answer: 36 (Option A)**

Answer

B. 40

Answer

C. 45

Answer

D. 48

Question 2

If a train travels 360 km in 6 hours, what is its average speed?

Accepted Answer

Correct answer: B. 60 km/h — Average speed = Distance/Time = 360/6 = 60 km/h

Answer

A. 50 km/h

Answer

C. 70 km/h

Answer

D. 80 km/h

Question 3

What is the square root of 196?

Accepted Answer

Correct answer: C. 14 — √196 = 14 (since 14 × 14 = 196)

Answer

A. 12

Answer

B. 13

Answer

D. 15

Question 4

Simplify: 8 + 12 ÷ 4 - 2 × 3

Accepted Answer

Correct answer: A. 5 — To simplify this expression, we apply the **order of operations (BODMAS/PEMDAS)**: Brackets, Orders, Division & Multiplication (left to right), then Addition & Subtraction (left to right). **Step 1: Perform Division** Division comes before addition and subtraction, so evaluate 12 \div 4 first. 12 \div 4 = 3 The expression becomes: 8 + 3 - 2 	imes 3 **Step 2: Perform Multiplication** Next, evaluate 2 	imes 3 . 2 	imes 3 = 6 The expression becomes: 8 + 3 - 6 **Step 3: Perform Addition and Subtraction (Left to Right)** Now evaluate from left to right. 8 + 3 = 11 **Step 4: Final Subtraction** 11 - 6 = 5 **Answer: 5 (Option A)**

Answer

B. 8

Answer

C. 11

Answer

D. 14

Question 5

If 5x + 10 = 35, what is the value of x?

Accepted Answer

Correct answer: B. 5 — 5x = 35 - 10 = 25, so x = 5

Answer

A. 3

Answer

C. 7

Answer

D. 9

Railway RRB / NTPC - MCQ Practice Questions