Multiple choice

Find the missing term in the following series: 15, 24, 42, 69, 105, ?

  1. 170

  2. 145

  3. 150

  4. 200

  5. 135
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C Correct answer
Explanation

Differences: 9, 18, 27, 36. Next difference is 45. 105 + 45 = 150.

AI explanation

The differences between consecutive terms are 9, 18, 27, and 36. The next difference in this pattern should be 45, as the differences are multiples of 9. Adding 45 to the last term gives 105 + 45 = 150. The missing term is 150.

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