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

Question 6

A shopkeeper sells an item for Rs. 600 and makes a profit of 25%. What was the cost price?

Accepted Answer

Correct answer: B. Rs. 480 — To find the cost price when selling price and profit percentage are known, use the relationship: 	ext{Selling Price} = 	ext{Cost Price} 	imes (1 + 	ext{Profit\%}/100) **Step 1: Set up the profit formula** When a shopkeeper makes a 25% profit, the selling price is 125% of the cost price. 	ext{Selling Price} = 	ext{Cost Price} 	imes \left(1 + \frac{25}{100}ight) **Step 2: Express in terms of cost price** 600 = 	ext{Cost Price} 	imes \frac{125}{100} 600 = 	ext{Cost Price} 	imes 1.25 **Step 3: Solve for cost price** 	ext{Cost Price} = \frac{600}{1.25} **Step 4: Calculate the final answer** 	ext{Cost Price} = \frac{600}{1.25} = \frac{600 	imes 100}{125} = \frac{60000}{125} = 480 Verification: If CP = Rs. 480, then profit = 600 - 480 = 120 , and profit% = \frac{120}{480} 	imes 100 = 25\% ✓ **Answer: The cost price was Rs. 480 (Option B)**

Answer

A. Rs. 450

Answer

C. Rs. 500

Answer

D. Rs. 520

Question 7

Two numbers are in the ratio 3:5. If their sum is 80, what are the numbers?

Accepted Answer

Correct answer: B. 30 and 50 — 3x + 5x = 80; 8x = 80; x = 10. Numbers are 30 and 50

Answer

A. 24 and 56

Answer

C. 20 and 60

Answer

D. 32 and 48

Question 8

What is the simple interest on Rs. 5000 at 8% per annum for 3 years?

Accepted Answer

Correct answer: B. Rs. 1200 — SI = (P × R × T)/100 = (5000 × 8 × 3)/100 = 1200

Answer

A. Rs. 1000

Answer

C. Rs. 1400

Answer

D. Rs. 1600

Railway RRB / NTPC - MCQ Practice Questions