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Part ACSIR NET December 2024each-cut-adds-exactly-one-piece

Each cut adds exactly one piece

A chocolate bar of 5 cm length and 4 cm width has to be cut into 1 cm × 1 cm pieces. How many minimum cuts would be required, if pieces are to be taken one-by-one? (One can start by cutting along either length or width, before removing 1 cm × 1 cm pieces one by one)

  1. A.20
  2. B.19✓
  3. C.18
  4. D.10

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.

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