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

Question : 1

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

4, 6, 18, 49, 201, 1011

a) 201

b) 49

c) 1011

d) 18

e) None of these

Answer: (d)

The series is

× 1 + 2, × 2 + 3, × 3 + 4, × 4 + 5, × 5 + 6

The wrong number is 18.

It should be 6 × 2 + 3 = 15

Question : 2

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

1, 3, 24, 360, 8640, 302400, ?

a) 154152000

b) 15425100

c) 14525100

d) 14515200

e) None of these

Answer: (d)

The series is as follows

×3, ×8, × 15, ×24, ×35, ×48

Hence, ? = 302400 × 48

= 14515200

Question : 3

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

12, 14, 32, 102, 416, 2090, ?

a) 12552

b) 17552

c) 15522

d) 13525

e) None of these

Answer: (a)

The series is as follows

×1 + 2, ×2 + 4, ×3 + 6, ×4 + 8, × 5 + 10, × 6 + 12...

Hence, ? = 2090 × 6 + 12 = 12552

Question : 4

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

70000, 14000, 2800, ?, 112, 22.4

a) 420

b) 540

c) 640

d) 560

e) None of these

Answer: (d)

The series is as follows:

÷ 5

Hence, ? = 2800 ÷ 5 = 560

Question : 5

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

8, 15, 28, 53, ?

a) 98

b) 102

c) 106

d) 100

e) None of these

Answer: (b)

Let x = 8

then 15 = 2x – 1 = y

28 = 2y – 2 = z

53 = 2z – 3 = m

Next term in the pattern should be

2m – 4 = 2 × 53 – 4

= 102

IMPORTANT quantitative aptitude EXERCISES

Number Series Model Questions Set 1 Online Quiz

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