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?

Editorial note: use the four cards pictured, one listed number per card; the opening list omits D.
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?

Editorial note: use the four cards pictured, one listed number per card; the opening list omits D.