Multiple choice

Directions: Select the term that will come next in the following series: 5, 9, ?, 29, 45

  1. 25

  2. 17

  3. 15

  4. 19
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series is: 5 (+4) = 9; 9 (+8) = 17; 17 (+12) = 29; 29 (+16) = 45. The pattern is adding multiples of 4.

AI explanation

The differences between the terms are consecutive multiples of 4, as seen by 9 - 5 = 4 and 45 - 29 = 16. Therefore, the second difference must be 8, making the missing term 9 + 8 = 17. The next difference of 12 correctly validates this because 17 + 12 = 29.

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