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Number Series Completion - General Inteligence & Reasoning MCQ Questions and Answers

Learn Number Series Completion mcq questions and answers with easy and logical explanations - Number Series Completion is part of competitive reasoning mcq questions. Page-10 section-2

Each section contains 100 MCQs on Number Series Completion .
91
Find out the wrong term: 0, 2, 3, 5, 8, 10, 15, 18, 24, 26, 35
Discuss
Answer & Solution
Answer: Option A
Solution:
The given sequence is a combination of two series:
I. 0, 3, 8, 15, 24, 35 and II. 2, 5, 10, 18, 26
The pattern in both I and II is + 3, + 5, + 7, + 9, .........
So, in II. 18 is wrong and must be replaced by (10 + 7) i.e., 17.
92
Find out the wrong term: 196, 169, 144, 121, 101
Discuss
Answer & Solution
Answer: Option A
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
93
Find out the wrong term: 2, 5, 10, 50, 500, 5000
Discuss
Answer & Solution
Answer: Option D
Solution:
Each term of the series is the product of the preceding two terms.
So, 5000 is wrong and must be replaced by (50 × 500) = i.e., 25000
94
Find out the wrong term: 5, 27, 61, 122, 213, 340, 509
Discuss
Answer & Solution
Answer: Option A
Solution:
We have :
I: 5       27       61       122       213       340     509
II:  22       34       61         91       127     169
III:        12        27        30        36       42
IV:            15        3         6     ;       6           
Clearly, the given series becomes a triangular pattern series if each term in IV: is 6.
Again, in II: 34 must be replaced by (61 - 24) i.e., 37 and 22 by (37 - 18) i.e., 19.
Thus, in the given series, 27 is wrong and must be replaced by (5 + 19) i.e., 24.
95
Find out the wrong term:3, 10, 27, 4, 16, 64, 5, 25, 125
Discuss
Answer & Solution
Answer: Option C
Solution:
The correct sequence is 3, 32 , 33,4, 42 , 43,5, 52 , 53
So. 10 is wrong and must replaced by 32 i.e., 9
96
Find out the wrong term: 46080, 3840, 384, 48, 24, 2, 1
Discuss
Answer & Solution
Answer: Option C
Solution:
The correct pattern is ÷ 12, ÷ 10, ÷ 8, ÷ 6,.........
So, 24 is wrong and must be replaced by (48 ÷ 6) i.e., 8.
97
Find out the wrong term: 25, 36, 49, 81, 121, 169, 225
Discuss
Answer & Solution
Answer: Option A
Solution:
The correct sequence is 52 , 72 , 92 , 112 , 132 , 152.
So, 36 is wrong.
98
Find out the wrong term: 5, 10, 40, 80, 320, 550, 2560
Discuss
Answer & Solution
Answer: Option C
Solution:
The correct pattern is ×2, ×4, ×2, ×4 . . . . . .
So, 550 is wrong and must be replaced by (320 × 2) i.e., 640
99
Find out the wrong term: 2, 5, 10, 17, 26, 37, 50, 64
Discuss
Answer & Solution
Answer: Option D
Solution:
The term of the series are (12 + 1)(22 + 1)(32 + 1)(42 + 1)(52 + 1)(62 + 1)(72 + 1),..............
So, 64 is wrong and must be replaced by (82 + 1) i.e., 65
100
Find out the wrong term: 3, 7, 15, 39, 63, 127, 255, 511
Discuss
Answer & Solution
Answer: Option B
Solution:
The correct pattern is × 2 + 1.
So, 39 is wrong and must be replaced by (15 × 2 + 1) i.e., 31.