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sonia varma

· started a discussion

· 1 Months ago

series can also be formed with (Question: 86530.0 )

*2+3 *2+5 *2+7 *2+11 *2+13 therfore the answer should be D here.

Question:

DIRECTIONS: In each of the following questions, one term in the number series is wrong. Find out the wrong term. 

6, 15, 35, 77, 165, 221               

Options:
A) 35
B) 77
C) 165
D) 221
E) 225
Solution:

Ans: (c) The terms of the series are products of two consecutive prime numbers i.e. (2 × 3), (3 × 5), (5 × 7), (7 × 11)

So, 165 is wrong and must be replaced by (11 × 13) i.e. 143.

kanhaiya jha

· commented

· 1 Months ago

yes :)

jai

· commented

· 1 Months ago

yes..u r correct

kanhaiya jha

· commented

· 1 Months ago

The terms of the series are products of two consecutive prime numbers i.e. (2 × 3), (3 × 5), (5 × 7), (7 × 11)....
So, 165 is wrong and must be replaced by (11 × 13) i.e. 143.
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