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QUESTION
Q
What will come in place of question mark (?) in the following number series: 7, 12, 32, 105, (?)

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

7, 12, 32, 105, (?)

A

428

B

214

C

218

D

416

E

320

A

428

B

214

C

218

D

416

E

320

Solution

The pattern of the number series is : (7 × 1) + (1 × 5) = 12 (12 × 2) +...

The pattern of the number series is :

(7 × 1) + (1 × 5) = 12

(12 × 2) + (2 × 4) = 32

(32 × 3) + (3 × 3) = 105

(105 × 4) + (4 × 2) = 428

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