Instructions

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

Question 98

1, 2, 6, 21, 88, ?

Solution

1*1 + 1 = 2

2*2 + 2 = 6

6*3 + 3 = 21

21*4 + 4 = 88

88*5 + 5 = 445

Option D is the right answer.

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