Multiple choice

Find the next three terms in the given series. 11, 15, 21, 29, ..., ....., .....

  1. 38, 50, 64

  2. 39, 52, 65

  3. 40, 52, 66

  4. 39, 51, 65

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Differences: 15-11=4, 21-15=6, 29-21=8. The differences are increasing by 2. Next differences: 10, 12, 14. 29+10=39, 39+12=51, 51+14=65.

AI explanation

The series follows a pattern of increasing consecutive even numbers added to each term. The differences are 4, 6, 8, 10, 12, and 14, meaning we add 10 to 29 to get 39, add 12 to 39 to get 51, and add 14 to 51 to get 65. Therefore, the next three terms are 39, 51, and 65.