Multiple choice

Find the missing term in the following series: 3, 6, 9, 12, 15, ?, 21, 24

  1. 16

  2. 10

  3. 18

  4. 19

  5. 17
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series follows an arithmetic progression with a common difference of 3. Adding 3 to the previous term 15 gives 18.

AI explanation

The numbers in this series increase by a constant common difference of 3. Adding 3 to 15 yields the missing term, which is 18. This is verified because adding 3 to 18 gives 21, matching the next number in the sequence. The result is 18.

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