Practice MCQ Questions and Answer on Series Completion
131.
120, 99, 80, 63, 48, ?
(A) 35
(B) 38
(C) 39
(D) 40
Solution:
The pattern is - 21, - 19, - 17, - 15,..... So, missing term = 48 - 13 = 35.
132.
1, 2, 6, 7, 21, 22, 66, 67, ?
(A) 70
(B) 134
(C) 201
(D) 301
Solution:
The pattern is + 1, x 3, + 1, x 3, + 1, x 3, + 1,..... So, missing term = 67 x 3 = 201.
133.
One term in the number series is wrong. Find out the wrong term.
380, 188, 92, 48, 20, 8, 2
(A) 8
(B) 20
(C) 48
(D) 188
Solution:
The correct pattern is - 192, - 96, - 48, - 24, - 12, - 6. So, 48 is wrong and must be replaced by (92 - 48) i.e. 44.
134.
One term in the number series is wrong. Find out the wrong term.
89, 78, 86, 80, 85, 82, 83
(A) 83
(B) 82
(C) 86
(D) 78
Solution:
The correct pattern is - 11, + 9, - 7, + 5, - 3, + 1. So, 86 is wrong and must be replaced by (78 + 9) i.e. 87.
135.
Choose the missing terms out of the given alternatives : Z, ?, T, N, ?, H, ?, B
(A) W, Q, K, E
(B) W, R, K, E
(C) X, Q, K, E
(D) X, R, K, E
Solution:
Z - 6 T - 6 N - 6 H - 6 BZ -3 W - 3 T - 3 Q- 3 N - 3 K - 3 H - 3 E - 3 B
136.
5, 2, 7, 9, 16, 25, ?
(A) 41
(B) 45
(C) 48
(D) 52
Solution:
Each term in the series, except the first two terms, is the sum of the preceding two terms. So, missing term = 16 + 25 = 41.
137.
One term in the number series is wrong. Find out the wrong term.
25, 36, 49, 81, 121, 169, 225
(A) 36
(B) 49
(C) 169
(D) 225
Solution:
The correct sequence is 52, 72, 92, 112, 132, 152. So, 36 is wrong.
138.
1, 4, 10, 22, 46, ?
(A) 64
(B) 86
(C) 94
(D) 122
Solution:
The pattern is + 3, + 6, + 12, + 24,..... So, missing term = 46 + 48 = 94.
139.
Choose the missing terms out of the given alternatives.
M, N, O, L, R, I, V, ?
(A) A
(B) E
(C) F
(D) H
Solution:
The given sequence is a combination of two series: I. M, O, R, V and II. N, L, I, ?
140.
One term in the number series is wrong. Find out the wrong term.
3, 2, 8, 9, 13, 22, 18, 32, 23, 42
(A) 8
(B) 9
(C) 13
(D) 22
Solution:
The given sequence is a combination of two series: I. 3, 8, 13, 18, 23 and II. 2, 9, 22, 32, 42 The pattern in I is + 5, and the pattern in II is + 10. So, in II, 9 is wrong and must be replaced by (2 + 10) i.e. 12.