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PIMSO 2025 - Mathematics - Kindergarten - National Round Question 7

PIMSO Maths · PIMSO 2025 - Mathematics - Kindergarten - National Round

Question 7

Cards A, B, and C have either number 21, 20, 27 and 11 behind them.
Card A has an even number.
Card B is the sum of five and six.
Card C is the biggest odd number
What is the number written on Card D?

Question illustration

Editorial note: use the four cards pictured, one listed number per card; the opening list omits D.
  1. 20
  2. 21
  3. 27
  4. 11