Number Series Model Questions Set 1 Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

What should come in place of the question mark (?) in the following number series?

2, 4, ?, 16, 32

a) 10

b) 12

c) 6

d) 8

e) None of these

Question : 2

What should come in place of the question mark (?) in the following number series?

24, 49, ?, 94, 15, 31, 59, 58

a) 63

b) 95

c) 51

d) 77

e) None of these

Question : 3

A vessel of 80 litre is filled with milk and water. 70% of milk and 30% of water is taken out of the vessel. It is found that the vessel is vacated by 55%. Find the initial quantity of milk and water.

a) 30, 50

b) 60, 20

c) 20, 60

d) 50, 30

e) None of these

Answer: (d)

Here, the % values of milk and water that is taken from the vessel should be taken into consideration.

⇒5 : 3

Ratio of milk to water = 5 : 3

∴ quantity of milk = ${80}/{5 + 3}$ × 5 = 50 litres

and quantity of milk = ${80}/{5 + 3}$ × 3 = 30 litres

Question : 4

What should come in place of the question mark (?) in the following number serie?

9, 27, 36, 63, 99, ?

a) 167

b) 162

c) 151

d) 152

e) 157

Question : 5

What should come in place of the question mark (?) in the following number series?

0, 7, 26, ?, 124, 215

a) 51

b) 88

c) 37

d) 63

e) None of these

Question : 6

Only one number is wrong in the following number series. Find out the wrong number.

2, 54, 300, 1220, 3674, 7350

a) 1220

b) 54

c) 3674

d) 300

e) None of these