RRB NTPC Mathematics

Question 1

A train travels 360 km in 4 hours. What is its speed in km/h?

Accepted Answer

90

Answer

80

Answer

100

Answer

72

Question 2

The LCM of 12 and 18 is:

Accepted Answer

36

Answer

24

Answer

54

Answer

72

Question 3

If a number is increased by 20% and then decreased by 20%, the net change is:

Accepted Answer

4% decrease

Answer

No change

Answer

4% increase

Answer

2% decrease

Question 4

What is the simple interest on ₹5,000 at 8% per annum for 3 years?

Accepted Answer

₹1,200

Answer

₹1,000

Answer

₹1,500

Answer

₹800

Question 5

The ratio of two numbers is 3:5 and their sum is 64. The larger number is:

Accepted Answer

40

Answer

24

Answer

32

Answer

48

Question 6

A man buys an article for ₹400 and sells it for ₹500. His profit percentage is:

Accepted Answer

25%

Answer

20%

Answer

15%

Answer

30%