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Odd Man Out and Series

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  1. 3, 10, 21, 36, 55, 70, 105 ?
    1. 105
    2. 70
    3. 36
    4. 55
Correct Option: B

The pattern is 1 x 3, 2 x 5, 3 x 7, 4 x 9, 5 x 11, 6 x 13, 7 x 15 etc.
So 70 is not correct.


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