Number Series Model Questions Set 1 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 16

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

13, 20, 14, 19, 15, ?

a) 18

b) 17

c) 16

d) 21

e) 20

Answer: (a)

number-series-mcq-problems-competitive-exams-quantitative-aptitude

Hence, question mark (?) should be replaced by 18.

Question : 17

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

11, 57, 149, 333, 701, (?)

a) 1347

b) 1437

c) 1447

d) 1368

e) None of these

Answer: (b)

The series is as follows: ×2 + 35

Hence, ? = 701 × 2 + 35 = 1437

Question : 18

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

7413, 7422, 7440, ?, 7503, 7548

a) 7456

b) 7477

c) 7464

d) 7466

e) None of these

Answer: (e)

The series is as follows

+ 9, + 18, + 27, +36, + 45

Hence, ? = 7440 + 27 = 7467

Question : 19

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

8, 20, 50, 125, ?, 781.25

a) 295.5

b) 312.5

c) 300

d) 315

e) None of these

Answer: (b)

The pattern of the series is as follows :

8 × 2.5 = 20

20 × 2.5 = 50

50 × 2.5 = 125

∴ ? = 125 × 2.5 = 312.5

Question : 20

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

Answer: (c)

The series is

× 6 + 42, × 5 + 30, × 4 + 20, × 3 + 12, × 2 + 6,

The wrong number is 3674

It should be 1220 × 3 + 12 = 3672

IMPORTANT quantitative aptitude EXERCISES

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