Question

5,11,18,1,4,?,16,49,121
What is the value of the question mark​

Answer 1

7

Explanation:

Split into groups of 3.

5, 11, 18

1, 4, ?

16, 49, 121

(5 − 1)² = 16

(11 − 4)² = 49

(18 − ?)² = 121

Therefore, ? = 7.

Answer 2

8

Explanation: