Practice MCQ Questions and Answer on Series Completion
181.
Choose the missing terms out of the given alternatives.
H, I, K, N, ?
(A) O
(B) Q
(C) R
(D) S
182.
Choose the missing terms out of the given alternatives : Y, W, T, P, K, E, X, ?, ?
(A) G, H
(B) P, G
(C) R, G
(D) S, R
Solution:
Y - 2 = W - 3 = T - 4 = P - 5 = K - 6 = E - 7 = X - 8 = P - 9 = G
183.
66, 36, 18, ?
(A) 3
(B) 6
(C) 8
(D) 9
Solution:
Each term in the series is the product of the digits of the preceding term. So, missing term = 1 x 8 = 8.
184.
2, 8, 16, 128, ?
(A) 2042
(B) 2046
(C) 2048
(D) 2056
Solution:
Each term in the series, except the first two terms, is the product of the preceding two terms. So, missing term = 16 x 128 = 2048.
185.
2, 3, 5,7,11,?, 17
(A) 12
(B) 13
(C) 14
(D) 15
Solution:
Clearly, the given series consists of prime numbers starting from 2. So, the missing term is the prime number after 11, which is 13.
186.
2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, ?
(A) 9
(B) 10
(C) 11
(D) 12
Solution:
The given sequence is a combination of three series : I. 1st, 4th, 7th, 10th, 13th terms i.e. 2, 4, 6, 8, ? II. 2nd, 5th, 8th, 11th terms i.e. 1, 4, 7, 10 III. 3rd, 6th, 9th, 12th terms i.e. 2, 5, 8, 11 Clearly, I consists of consecutive even numbers. So, the missing term is 10.
187.
One term in the number series is wrong. Find out the wrong term.
1, 3, 10, 21, 64, 129, 356, 777
(A) 21
(B) 129
(C) 10
(D) 356
Solution:
The correct pattern is x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1,..... So, 356 is wrong and must be replaced by (129 x 3 + 1) i.e. 388.
188.
One term in the number series is wrong. Find out the wrong term.
196, 169, 144, 121, 101
(A) 101
(B) 121
(C) 169
(D) 196
Solution:
The sequence is (14)2, (13)2, (12)2, (11)2, (10)2. So, 101 is wrong and must be replaced by (10)2 i.e. 100.
189.
Choose the missing terms out of the given alternatives.
B, D, F, I, L, P, ?
(A) R
(B) S
(C) T
(D) U
190.
Choose the correct order of the given alternative : FAK, IEM, LIO, ?
(A) OMQ
(B) OPQ
(C) MNO
(D) NOP
Solution:
F A K +3 +4 +2 I E M +3 +4 +2 L I O +3 +4 +2 O M Q