Question 7

Select the number that can replace the question mark (?) in the following series.
3, 12, 36, 80, ?, 248

Solution

Given series 3, 12, 36, 80, ?, 248

take of difference 12-3 = 9, 36-12= 24, 80-36= 44 ,......

Again take difference of difference 24-9 = 15 , 44-24 = 20 next 25 and so on

then 44 + 25 = 69

therefore ? = 80+ 69 = 149 Ans

Share on Whatsapp Share on Whatsapp

Create a FREE account and get:

Select the number that can replace the question mark (?) in the following series.3, 12, 36, 80, ?, 248