Question

Which number will replace the question mark (?) in the following number series? 24, 61, 122, 213, ?

• A. 340
• B. 334
• C. 343
• D. 337

Answer 1

Answer:

A. 340

$3^3-3 = 24$

$4^3-3 = 61$

$5^3-3 = 122$

$6^3-3 = 213$

So, $7^3-3 = 340$