The correct answer is 42. The most common element there is the multiplication and addition of 2 to the numbers. So we have:
13 x 2 + 2 = 28
16 x 2 + 2 = 34
20 x 2 + 2 = 42
@rimurutempest got it earlier than me. @gungunkrishu
You are viewing a single comment's thread from: