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Part ACSIR NET December 2024the-closest-factor-pair-minimises-the-sum

The closest factor pair minimises the sum

The square of the geometric mean of two positive integers is 30. The smallest possible sum of the two integers is

  1. A.10
  2. B.11✓ Correct
  3. C.13
  4. D.17

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward, and why this one tests execution slip.

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50 are analysed free — try those first.

The trap it tests

Execution slip

The idea was right. The computation was not.

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