Number Series Ques 7

Question-

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

$1 \quad 2 \quad 6 \quad 21 \quad 88 \quad$ ?

(1) 539

(2) 398

(3) 216

(4) 445

(5) 615

Show Answer

Correct Answer: (4)

Solution: (4)

The pattern is:

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

$2 \times 2+2=4+2=6$

$6 \times 3+3=18+3=21$

$21 \times 4+4=84+4=88$

$88 \times 5+5=440+5=445$