100+ Wrong Number Series Questions and Answers - 2

Question: 6

In each of the following questions, one term in the number series is wrong. Find out the wrong term.
3, 10, 27, 4, 16, 64, 5, 25, 125

(A) 27

(B) 10

(D) 3

View Answer

Ans: B

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

In each of the following questions, one term in the number series is wrong. Find out the wrong term.
121, 143, 165, 186, 209

(A) 143

(B) 165

(D) 209

View Answer

Ans: C

Each term of the series is increased by 22 to obtain the next term.
So, 186 is wrong and must be replaced by (165 +22) i.e. 187.

Question: 8

In each of the following questions, one term in the number series is wrong. Find out the wrong term.
10, 14, 28, 32, 64, 68, 132

(A) 28

(B) 32

(D) 132

View Answer

Ans: D

Alternately, the numbers are increased by four and doubled to get the next number.
Thus, 10 + 4 = 14; 14 x 2 = 28; 28 + 4 = 32; 32 x 2 = 64 and so on.
So, 132 is wrong and must be replaced by (68 x 2) i.e. 136.

Question: 9

In each of the following questions, one term in the number series is wrong. Find out the wrong term.
5, 10, 17, 24, 37

(A) 37

(B) 24

(D) 10

View Answer

Ans: B

The sequence is +5, +7,....
So, 24 is wrong and should be replaced by (17 + 9) i.e. 26.

Question: 10

In each of the following questions, one term in the number series is wrong. Find out the wrong term.
3, 8, 15, 24, 34, 48, 63

(A) 24

(B) 34

(D) 63

View Answer

Ans: B

The difference between consecutive terms of the given series are respectively 5, 7, 9, 11 and 13.
Clearly, 34 is a wrong number and must be replaced by (24 + 11) i.e. 35.

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100+ Wrong Number Series Questions and Answers - 2

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