Question

1,3,3,6,7,9 what is the next number will bi arrived​

Answer 1

What will be the next number in the series:

1,3, 3, 6,7,9,?,12,21

Clearly, the given sequence is a combination of two series :

I, 3, 7, ?, 21 and

II. 3, 6, 9, 12

The pattern followed in I is + 2, + 4, + 6, ..and the pattern followed in II is + 3.

So, missing number = 7+ 6 = 13.

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