number series Practice Questions Answers Test with Solutions & More Shortcuts

Directions:
In each of the following questions, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.

Question : 11 [L.I.T.T.M. 2005]

325, 259, 204, 160, 127, 105, ?

a) 94

b) 96

c) 98

d) 100

Answer: (a)

The pattern is - 66, - 55, - 44, - 33, - 22, …..

So, missing term = 105 - 11 = 94.

Question : 12 [R.R.B. 2005]

1, 4, 10, 22, 46?

a) 64

b) 86

c) 94

d) 122

Answer: (c)

The pattern is + 3, + 6, + 12, + 24, …..

So, missing term = 46 + 48 = 94.

Question : 13 [S.S.C. 2002]

5760, 960, ?, 48, 16, 8

a) 120

b) 160

c) 192

d) 240

Answer: (c)

The pattern is ÷6, ÷5, ÷4, ÷3, ÷2.

So, missing term = 960 ÷ 5 = 192.

Question : 14 [C.P.O. 2004]

48, 24, 96, 48, 192, ?

a) 76

b) 90

c) 96

d) 98

Answer: (c)

The pattern is ÷2, ×4, ÷2, ×4, …..

So, missing term = 192 ÷ 2 = 96. 

Question : 15 [P.G.D.T.M., 2006]

10, 14, 26, 42, 70, ?

a) 100

b) 102

c) 106

d) 114

Answer: (d)

Each term in the series, except the first two terms, is 2 more than the sum of the preceding two terms.

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