Multiple choice

Directions: Find the next term of the series. 99, 63, 35, 15, ___

  1. 7

  2. 3

  3. 5

  4. 1

  5. None of these
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B Correct answer
Explanation

The series is: 99, 63, 35, 15. Differences: 36, 28, 20. The differences decrease by 8. Next difference = 20 - 8 = 12. Next term = 15 - 12 = 3.

AI explanation

Each term represents the sum of the squares of the digits of the previous term: 9^2 + 9^2 = 81, wait, 81 is not 63. Alternatively, the differences are 99-63=36, 63-35=28, 35-15=20, decreasing by 8 each time. The next difference is 20-8=12, so 15-12=3. The result is 3.

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