Practice MCQ Questions and Answer on Number Series Completion
31.
Find the missing term: 8, 28, 116, 584 , ?
(A) 1752
(B) 3502
(C) 3504
(D) 3508
Solution:
The pattern is x3+4, x4+4, x5+4,...............So, missing term=584x6+4=3508
32.
Find the missing term: 13, 35, 57, 79, 911, ?
(A) 1110
(B) 1112
(C) 1113
(D) 1315
Solution:
The term of the given series are numbers formed by joining together consecutive odd numbers in order i.e., 1 and 3, 3 and 5, 5 and 7, 7 and 9, 9 and 11...................So, missing term = number formed by joining 11 and 13 = 1113
33.
3, 8, 10, 15, 17, 22, 24, ... choose which pair of numbers comes next?
(A) 26, 28
(B) 29, 34
(C) 29, 31
(D) 26, 31
Solution:
This is an alternating addition series that adds 5, then 2, then 5, and so on.
34.
7, 10, 8, 11, 9, 12, ... What number should come next?
(A) 7
(B) 10
(C) 12
(D) 13
Solution:
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted. Alternate Solution : Above Series contains two sub series in it Series 1st = 7, 8, 9, 10 Series 2nd = 10, 11, 12 Note : Both sub series is in ascending order. Next number is greater by 1 from the previous one.
35.
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
36.
Find out the wrong term: 11, 5, 20, 12, 40, 26, 74, 54
(A) 5
(B) 20
(C) 40
(D) 26
Solution:
The given sequence is a combination of two series:I: 11, 20, 40, 74 and II: 5, 12, 26, 54The correct pattern in I: is + 9, + 18, + 36,.....So, 40 is wrong and must be replaced by (20 + 18) i.e., 38.
37.
Find out the wrong term: 8, 13, 21, 32, 47, 63, 83
(A) 13
(B) 21
(C) 32
(D) 47
Solution:
The correct pattern is + 5, + 8, + 11, + 14, ............So, 47 is wrong and must be replaced by (32 + 14) i.e., 46
The pattern is × 3, + 4, × 5, + 6, × 7, So, missing term = 1127 + 8 =1135
39.
2, 4, 6, 8, 10, ... What number should come next?
(A) 11
(B) 12
(C) 13
(D) 14
Solution:
This is a simple addition series. Each number increases by 2.
40.
4, 8, 22, 12, 16, 22, 20, 24, ... choose which pair of numbers comes next?
(A) 28, 32
(B) 28, 22
(C) 22, 28
(D) 32, 36
Solution:
This is an alternating repetition series, with a random number, 22, interpolated as every third number into an otherwise simple addition series. In the addition series, 4 is added to each number to arrive at the next number.