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Part ACSIR NET December 2024eliminate-until-one-match-remains

Eliminate until one match remains

Frank, Sam, Tom and David came first, second, third and fourth in a race but not necessarily in this order. Only one had first letter of position matching that of his name. If Tom came first and Sam did not come second then

  1. A.David came third
  2. B.Frank came fourth✓ Correct
  3. C.David came fourth
  4. D.Sam came fourth

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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