100+ Series Completion Questions for NTSE with Answers - 2
Question: 6
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.
11, 10, ?, 100, 1001, 1000, 10001
(A) 101
(B) 110
(C) 111
(D) 112
Ans: A
The pattern is – 1, × 10 + 1, - 1, × 10 + 1, - 1, × 10 + 1, ….
So, missing term = 10 × 10 + 1 = 101.
Question: 7
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.
2, 5, 9, ?, 20, 27
(A) 14
(B) 16
(C) 18
(D) 24
Ans: A
The pattern is + 3, + 4, + 5, + 6, ….
So, missing term = 9 + 5 = 14.
Question: 8
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.
1, 4, 10, 22, 46, ?
(A) 64
(B) 86
(C) 94
(D) 122
Ans: C
The pattern is + 3, + 6, + 12, + 24, ….
So, missing term = 46 + 48 = 94.
Question: 9
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.
5, 2, 7, 9, 16, 25, ?
(A) 41
(B) 45
(C) 48
(D) 52
Ans: A
Each term in the series, except the first two terms, is the sum of the preceding two terms.
So, missing term = 16 + 25 = 41.
Question: 10
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.
1, 2, 6, 7, 21, 22, 66, 67, ?
(A) 70
(B) 134
(C) 201
(D) 301
Ans: C
The pattern is + 1, × 3, + 1, × 3, + 1, × 3, + 1, ….
So, missing term = 67 × 3 = 201.
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