Find the missing number?

Question

Find the missing number?

A. 215

B. 343

C. 216

D. 342

Answer: A

Solution:

Pattern is that each number is of the form N³ – 1.

N= 3 which gives 3³ – 1= 26

N= 4 which gives 4³ – 1= 63

N= 5 which gives 5³ – 1= 124

Hence answer would be N= 6

which gives 6³ – 1= 215