In this type of questions, one term in t...

In this type of questions, one term in the number series is wrong. Find out the wrong term.
`6, 15, 35, 77, 165, 221`

A

35

B

77

C

165

D

15

Text Solution

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The correct Answer is:

C

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

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In this type of questions, one term in the number series is wrong. Find out the wrong term. `6, 15, 35, 77, 165, 221`

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In this type of questions, one term in the number series is wrong. Find out the wrong term.
`6, 15, 35, 77, 165, 221`