Number Series Ques 61
Question-
What will come in place of the question mark (?)
$1 \quad 3 \quad 9 \quad 31 \quad 129 \quad$ ?
(1) 393
(2) 813
(3) 651
(4) 571
(5) 442
Show Answer
Correct Answer: (3)
Solution: (3)
The pattern is :
$1 \times 1+2=1+2=3$
$3 \times 2+3=6+3=9$
$9 \times 3+4=27+4=31$
$31 \times 4+5=124+5=129$
$129 \times 5+6=645+6=651$
BETA
