One term in the number series is wrong. Find out the wrong term. 1, 2, 4, 8, 16, 32, 64, 96
SOLUTION ANALYSIS
Correct Option: D
Each term of the series is obtained by multiplying the preceding term by 2.
So, 96 is wrong and must be replaced by (64 x 2) i.e. 128.
Question 2 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 3, 4, 10, 32, 136, 685, 4116
SOLUTION ANALYSIS
Correct Option: B
The correct pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,.....
So, 32 is wrong and must be replaced by (10 x 3 + 3) i.e. 33.
Question 3 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 105, 85, 60, 30, 0, - 45, - 90
SOLUTION ANALYSIS
Correct Option: C
The correct pattern is - 20, - 25, - 30,.....
So, 0 is wrong and must be replaced by (30 - 35) i.e. - 5.
Question 4 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 125, 126, 124, 127, 123, 129
SOLUTION ANALYSIS
Correct Option: D
The correct pattern is + 1, - 2, + 3, - 4, + 5.
So, 129 is wrong and must be replaced by (123 + 5) i.e. 128.
Question 5 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 25, 36, 49, 81, 121, 169, 225
SOLUTION ANALYSIS
Correct Option: A
The correct sequence is 52, 72, 92, 112, 132, 152. So, 36 is wrong.
Question 6 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 3, 10, 27, 4, 16, 64, 5, 25, 125
SOLUTION ANALYSIS
Correct Option: C
The correct sequence is 3, 32, 33, 4, 42, 43, 5, 52, 53.
So, 10 is wrong and must be replaced by 32 i.e. 9.
Question 7 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 2, 5, 10, 17, 26, 37, 50, 64
SOLUTION ANALYSIS
Correct Option: D
The terms 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.
Question 8 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 15, 16, 22, 29, 45, 70
SOLUTION ANALYSIS
Correct Option: B
The correct pattern is + 1, + 4, + 9, + 16, + 25 i.e. + 12, + 22, + 32, + 42, + 52.
So, 22 is wrong and must be replaced by (16 + 4) i.e. 20.
Question 9 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 56, 58, 62, 70, 84, 118, 182
SOLUTION ANALYSIS
Correct Option: C
The correct pattern is + 2, + 4, + 8, + 16, + 32, + 64 i.e. + 2, + 22, + 23, + 24, + 25, + 26.
So, 84 is wrong and must be replaced by (70 + 16) i.e. 86.
Question 10 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 1, 5, 5, 9, 7, 11, 11, 15, 12, 17
SOLUTION ANALYSIS
Correct Option: B
The given sequence is a combination of two series:
I. 1, 5, 7, 11, 12 and II. 5, 9, 11, 15, 17
The pattern in both I and II is + 4, + 2, + 4, + 2. So, 12 is wrong and must be replaced by (11 + 2) i.e. 13.
Question 11 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 1, 5, 9, 15, 25, 37, 49
SOLUTION ANALYSIS
Correct Option: B
The terms of the given series are 12, (22 + 1), 32, (42..+ 1), 52, (62 + 1), 72.
So, 15 is wrong and must be replaced by (42 + 1) i.e. 17.
Question 12 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 8, 14, 26, 48, 98, 194, 386
SOLUTION ANALYSIS
Correct Option: B
The correct pattern is x 2 - 2.
So, 48 is wrong and must be replaced by (26 x 2 - 2) i.e. 50.
Question 13 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 8, 13, 21, 32, 47, 63, 83
SOLUTION ANALYSIS
Correct Option: D
The correct pattern is + 5, + 8, + 11, + 14,.....
So, 47 is wrong and must be replaced by (32 + 14) i.e. 46.
Question 14 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 6, 15, 35, 77, 165, 221
SOLUTION ANALYSIS
Correct Option: C
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.
Question 15 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 2, 6, 24, 96, 285, 568, 567
SOLUTION ANALYSIS
Correct Option: B
The correct pattern is x 6 - 6, x 5 - 5, x 4 - 4,.....
So, 24 is wrong and must be replaced by (6 x 5 - 5) i.e. 25.
Question 16 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 4, 10, 22, 46, 96, 190, 382
SOLUTION ANALYSIS
Correct Option: C
The correct pattern is + 6, + 12, + 24, + 48, + 96, + 192.
So, 96 is wrong and must be replaced by (46 + 48) i.e. 94.
Question 17 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 2, 5, 10, 50, 500, 5000
SOLUTION ANALYSIS
Correct Option: D
Each term of the series is the product of the preceding two terms.
So, 5000 is wrong and must be replaced by (50 x 500) i.e. 25000.
Question 18 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 3, 2, 8, 9, 13, 22, 18, 32, 23, 42
SOLUTION ANALYSIS
Correct Option: B
The given sequence is a combination of two series:
I. 3, 8, 13, 18, 23 and II. 2, 9, 22, 32, 42
The pattern in I is + 5, and the pattern in II is + 10. So, in II, 9 is wrong and must be replaced by (2 + 10) i.e. 12.
Question 19 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 196, 169, 144, 121, 101
SOLUTION ANALYSIS
Correct Option: A
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.
Question 20 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 1, 3, 12, 25, 48
SOLUTION ANALYSIS
Correct Option: C
The terms of the series are (l2 - 02), (22 - l2), (42 - 22), (62 - 32) and (82 - 42).
So, 25 is wrong and must be replaced by (62 - 32) i.e. 27.
