Practice MCQ Questions and Answer on Series Completion
91.
Choose the missing terms out of the given alternatives.
PERPENDICULAR, ERPENDICULA, RPENDICUL, ?
(A) PENDICUL
(B) PENDIC
(C) ENDIC
(D) ENDICU
Solution:
Answer & Solution Answer: Option E Solution: Each term of the series is obtained by removing two letters from the preceding term one from the beginning and one from the end, So, the missing term is PENDICU.
92.
One term in the number series is wrong. Find out the wrong term.
105, 85, 60, 30, 0, - 45, - 90
(A) 105
(B) 60
(C) 0
(D) -45
Solution:
The correct pattern is - 20, - 25, - 30,..... So, 0 is wrong and must be replaced by (30 - 35) i.e. - 5.
93.
One term in the number series is wrong. Find out the wrong term.
6, 15, 35, 77, 165, 221
(A) 35
(B) 77
(C) 165
(D) 15
Solution:
The terms of the series are products of two consecutive prime numbers i.e. (2 x 3), (3 x 5), (5 x 7), (7 x 11),..... So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.
94.
Choose the missing terms out of the given alternatives.
ajs, gpy, ?, sbk, yhq
(A) dmv
(B) mve
(C) oua
(D) qzi
95.
1, 3, 4, 8, 15, 27, ?
(A) 37
(B) 44
(C) 50
(D) 55
Solution:
The sum of any three consecutive terms of the series gives the next term. So, missing number = 8 + 15 + 27 = 50.
96.
1, 9, 25, 49, ?, 121
(A) 64
(B) 81
(C) 91
(D) 100
Solution:
The given series consists of squares of consecutive odd numbers i.e. 12, 32, 52, 72,..... So, missing term = 92 = 81.
97.
4, 10, ?, 82, 244, 730
(A) 24
(B) 28
(C) 77
(D) 218
Solution:
Each number in the series is 2 less than thrice the preceding number. So, missing number = (10 x 3) - 2 = 28.
98.
Choose the missing terms out of the given alternatives.
AZ, CX, FU, ?
(A) IR
(B) IV
(C) JQ
(D) KP
99.
3, 7, 23, 95, ?
(A) 62
(B) 128
(C) 479
(D) 575
Solution:
The pattern is x 2 + 1, x 3 + 2, x 4 + 3,..... So, missing term = 95 x 5 + 4 = 479.
100.
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.