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SASMO 2017 — Primary 2 (Grade 2) Question 14

SASMO · SASMO 2017 — Primary 2 (Grade 2)

Question 14

A bag contains 2 blue marbles and 1 red marble. Alice and Bob each pick one without looking. Alice sees her own marble and truthfully says she knows Bob’s colour. What colours did they pick?

Source excerpt for visual verification:

Question illustration
  1. Alice blue, Bob blue
  2. Alice red, Bob blue
  3. Alice blue, Bob red
  4. Alice red, Bob red
  5. None of the above