Practice MCQ Questions and Answer on Number Series Completion
231.
Find the missing term: 0, 2, 8, 14, ?, 34
(A) 20
(B) 23
(C) 24
(D) 25
Solution:
The pattern is + 2, + 6, + 6, + 10, +10,..... So, the missing term = 14 + 10 =24
232.
Find the missing term: 4 ,7, 12, 19, 28, ?
(A) 30
(B) 36
(C) 39
(D) 49
Solution:
The pattern is +3,+5,+7,+9,............So, missing term=(28+11)=39
233.
Find the missing term: 5824, 5242, ?, 4247, 3823
(A) 4467
(B) 4718
(C) 4856
(D) 5164
Solution:
Each term in the series is obtained by subtracting from the preceding term the number formed by the first three digits of the preceding term,So, missing term = 5242 - 524 = 4718
234.
Find the missing number:- 0.5, 0.55, 0.65, 0.8, ?
(A) 0.9
(B) 0.82
(C) 1
(D) 0.95
Solution:
The pattern is + 0.05, + 0.10, + 0.15,................ So, missing term = 0.8 + 0.20 = 1
235.
8, 22, 8, 28, 8, ... What number should come next?
(A) 9
(B) 29
(C) 32
(D) 34
Solution:
This is a simple addition series with a random number, 8, interpolated as every other number. In the series, 6 is added to each number except 8, to arrive at the next number.
236.
Find out the wrong term: 5, 27, 61, 122, 213, 340, 509
(A) 27
(B) 61
(C) 122
(D) 509
Solution:
The terms of the series are (23 - 3), (33 - 3), (43 - 3), (53 - 3), (63 - 3), (73 -3), (83 -3). So, 27 is wrong and must be replaced (33 - 3) i.e., 24
237.
Find the missing term : 3, 5, 35, 10, 12, 35, _ , _
(A) 19 , 35
(B) 17, 19
(C) 19, 24
(D) 22, 35
Solution:
Every 3rd multiple of the given series is constant and the rest of the series is as follow as showing in below image
238.
Find the missing term :9*2 : 9*9 : : 9*5 : ?
(A) 9*4
(B) 9*6
(C) 9*7
(D) 9*8
Solution:
9 × 2 : 9 × 9 : : 9 × 5 : ?18 : 81 : : 45 : 9 × 6 So. 9 × 6 will come in place of question mark.
239.
11, 14, 14, 17, 17, 20, 20, ... choose which pair of numbers comes next?
(A) 23, 23
(B) 23, 26
(C) 21, 24
(D) 24, 24
Solution:
This is a simple addition series with repetition. It adds 3 to each number to arrive at the next, which is repeated before 3 is added again.
The given series is a triangular pattern series.So, we have Series I : 2 9 28 ? 126 217 344 Series II : 7 19 ? ? 91 127 Series III : 12 ? ? ? 36 Clearly, to form a pattern, the missing terms in Series III must be 18, 24, 30So, missing term = 127 + (61 + 24 + 6)= 127 + 91= 218