Question 31

Select the number that can replace the question mark (?) in the following series.
1, 11, 35, 79, ?, 251

Solution

Given series 1, 11, 35, 79, ?, 251

the given series follow the pattern

1 = $$ (1)^3 + (1)^2 -1$$

11= $$ (2)^3+ (2)^2 -1$$

35 = $$ (3)^3+ (3)^2 -1$$

79 =$$ (4)^3+ (4)^2 -1$$

next ? = $$ (5)^3+ (5)^2 -1$$

? = 125 +25 -1

? = 150-1

? = 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.1, 11, 35, 79, ?, 251