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Part ACSIR NET June 2025the-change-is-measured-against-the-intended-2x-not-against-x

The change is measured against the intended 2x not against x

A number is mistakenly divided by 2 instead of being multiplied by 2. What is the change in the result caused by this mistake?

  1. A.25%
  2. B.50%
  3. C.75%✓
  4. D.100%

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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