What should come in place of the question mark (?) in the following number series? 3 4 12 45 ? 1005
What should come in place of the question mark (?) in the following number series?
3 4 12 45 ? 1005
5 views
1 Answers
The series is as follows starting from second number
x × 1 + 12 , x × 2 + 22, x ×3 + 32, x × 4 + 42, x ×5 +52
(x denotes the previous number in the series)
? = x × 4 + 42 = 45 × 4 + 16 = 196
5 views
Answered