Combinations
 

Combinations problem 8


Draw one of six different numbers on each side of a token. We are interested in how many of such tokens we need to make if we want to have a token with any combination of two numbers.


(Note: The tokens can be imagined as pairs of numbers (a, b) and the pairs (a, b) and (b, a) are the same token.)


 

material editor: Hope Ezeocha