Find the Odd one out of the given series
6, 15, 35, 77, 165, 2215

## Q: Find the Odd one out of the given series 6, 15, 35, 77, 165, 221

- 1221false
- 2165true
- 335false
- 477false

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## Answer : 2. "165"

Explanation :

Answer: B) 165 Explanation: 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.