Railway RRB / NTPC — MCQ Practice Questions & Answers

Question 1

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 2

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 3

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

Question 4

A train leaves Station A at 8:00 AM and reaches Station B at 2:30 PM. If the distance is 195 km, what is the average speed?

Accepted Answer

Correct answer: B. 30 km/h — Time = 6.5 hours; Speed = 195/6.5 = 30 km/h

Answer

A. 25 km/h

Answer

C. 35 km/h

Answer

D. 40 km/h

Question 5

What is 20% of 35% of 2000?

Accepted Answer

Correct answer: B. 140 — 35% of 2000 = 700; 20% of 700 = 140

Answer

A. 120

Answer

C. 160

Answer

D. 180

Question 6

If a number is increased by 15% and the result is 345, what was the original number?

Accepted Answer

Correct answer: B. 300 — x × 1.15 = 345; x = 345/1.15 = 300

Answer

A. 290

Answer

C. 310

Answer

D. 320

Question 7

The average of five numbers is 22. If four of them are 18, 24, 20, and 26, what is the fifth number?

Accepted Answer

Correct answer: B. 22 — Sum = 22 × 5 = 110; 18 + 24 + 20 + 26 = 88; Fifth = 110 - 88 = 22

Answer

A. 20

Answer

C. 24

Answer

D. 26

Question 8

A mixture contains milk and water in the ratio 5:3. If there are 40 liters of milk, how much water is there?

Accepted Answer

Correct answer: B. 24 liters — If milk is 5 parts and equals 40L, then 1 part = 8L; water (3 parts) = 24L

Answer

A. 20 liters

Answer

C. 28 liters

Answer

D. 32 liters

Railway RRB / NTPC - MCQ Practice Questions