RRB NTPC Mathematics 2

Question 1

The average of five consecutive odd numbers is 25. The largest number is:

Accepted Answer

29

Answer

27

Answer

31

Answer

23

Question 2

A pipe can fill a tank in 6 hours and another can empty it in 8 hours. If both are open, how long to fill the tank?

Accepted Answer

24 hours

Answer

14 hours

Answer

20 hours

Answer

12 hours

Question 3

√(144) + √(81) = ?

Accepted Answer

21

Answer

20

Answer

23

Answer

25

Question 4

Two numbers are in the ratio 4:7. If their difference is 18, the smaller number is:

Accepted Answer

24

Answer

42

Answer

28

Answer

32

Question 5

What is 15% of 240?

Accepted Answer

36

Answer

30

Answer

32

Answer

40

Question 6

A car covers 150 km in 2.5 hours. How long will it take to cover 300 km at the same speed?

Accepted Answer

5 hours

Answer

4 hours

Answer

6 hours

Answer

4.5 hours