Instructions

What will come in place of the question mark (?) in the given number series?

Question 46

1 2 6 21 88 ?

Solution

The pattern followed is :

1 $$\times 1 + 1$$ = 2

2 $$\times 2 + 2$$ = 6

6 $$\times 3 + 3$$ = 21

21 $$\times 4 + 4$$ = 88

88 $$\times 5 + 5$$ = 445

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