Series Completion - Study Mode

[#61] One term in the number series is wrong. Find out the wrong term. 1, 5, 9, 15, 25, 37, 49
Correct Answer

(B) 15

Explanation

Solution: The terms of the given series are 1 2 , (2 2 + 1), 3 2 , (4 2 ..+ 1), 5 2 , (6 2 + 1), 7 2 . So, 15 is wrong and must be replaced by (4 2 + 1) i.e. 17.

[#62] One term in the number series is wrong. Find out the wrong term. 4, 10, 22, 46, 96, 190, 382
Correct Answer

(C) 96

Explanation

Solution: The correct pattern is + 6, + 12, + 24, + 48, + 96, + 192. So, 96 is wrong and must be replaced by (46 + 48) i.e. 94.

[#63] One term in the number series is wrong. Find out the wrong term. 2, 6, 24, 96, 285, 568, 567
Correct Answer

(B) 24

Explanation

Solution: 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.

[#64] One term in the number series is wrong. Find out the wrong term. 3, 2, 8, 9, 13, 22, 18, 32, 23, 42
Correct Answer

(B) 9

Explanation

Solution: 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.

[#65] One term in the number series is wrong. Find out the wrong term. 196, 169, 144, 121, 101
Correct Answer

(A) 101

Explanation

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.