Number Series Ques 156
Question-
What will come in place of the question mark (?)
$10,24,50, ?, 170$
(1) 70
(2) 80
(3) 120
(4) 130
(5) 140
Show Answer
Correct Answer: (3)
Solution: (3)
The pattern is :
$3^{2}+1=9+1=10$
$5^{2}-1=25-1=24$
$7^{2}+1=49+1=50$
$11^{2}-1=121-1=120$
$13^{2}+1=169+1=170$
Note : 3, 5, 7, 11 and 13 are consecutive prime numbers.
BETA
