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Find the missing number in the series.

 1, 2, 3, 5, 7 .......... : 

(a) 9 

(b) 8 

(c) 10 

(d) 13

1 Answer

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Correct option (c) 10


Series moves with a difference of 1, 1, 2, 2, 3, 3 and so on. Hence, the missing number is 10.

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