Multiple choice

Directions: Find the missing term in the following series. -9, -2, ?, 15, 25

  1. 0

  2. 4

  3. 6

  4. 8
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C Correct answer
Explanation

Differences are: -2 - (-9) = 7. Next difference should be 8, then 9, then 10. -2 + 8 = 6. 6 + 9 = 15. 15 + 10 = 25. The pattern holds.

AI explanation

The series follows a pattern of adding consecutive square numbers to the previous term. Adding 7 to -9 gives the first difference of -2, and adding 8 to -2 gives 6. Continuing this pattern, adding 9 to 6 gives 15, and adding 10 to 15 gives 25. The missing term is 6.

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