
PROBLEM: A playing card hand contains:
What is the trump suit? WHAT DO WE KNOW?
SOLUTION: Gross method: Write down all the possible combinations of cards and check whether the combination of numbers of cards meets the requirements:

and so on How many cases do we have to consider? Or, how many ways are there that four numbers can add up to 13? 
Last updated 2000/01/21
© J.A.N. Lee, 2000.