Top 100+ Number Series Questions for SSC, Bank Exams - 1

Question: 1

Which of the following will not be a number of the series 1, 8, 27, 64, 125, .....?

(A) 256

(B) 512

(C) 729

(D) 1000

Ans: A

The given series consists of cubes of natural numbers only. 256 is not the cube of any natural number.

Question: 2

Which term of the series 5, 8, 11, 14, ..... is 320?

(A) 64th

(B) 104th

(C) 105th

(D) 106th

Ans: D

Clearly, 5 + 3 = 8, 8 + 3 = 11, 11 + 3 = 14, ....
So, the series in an A.P. in which a = 5 and d = 3.
Let the number of terms be n.
Then, 320 = 5 + (n - 1) x 3 or (n - 1) = 105 or n = 106.

Question: 3

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 fill in the blank spaces.
5, 16, 49, 104, (.....)

(A) 110

(B) 125

(C) 181

(D) 198

Ans: C

The pattern is +11, +33, +55, ....i.e. + (11x1), +(11x3), +(11x5), .....
∴ Missing number = 104 + (11 x 7) = 181.

Question: 4

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 fill in the blank spaces.
1, 6, 13, 22, 33, (.....)

(A) 42

(B) 46

(C) 47

(D) 49

Ans: B

The pattern is +5, +7, +9, +11, ....
∴ Missing number = 33 + 13 = 46.

Question: 5

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 fill in the blank spaces.
2, 3, 8, 63, (.....)

(A) 3968

(B) 3098

(C) 1998

(D) 1038

Ans: A

Each term in the series is one less than the square of the preceding term.
Thus, 22 - 1 = 3, 32 - 1 = 8, 82 - 1 = 63.
∴ Missing term = (63)2 - 1 = 3969 -1 = 3968.

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