Problem Solving

Question

The following basketball jerseys numbers belong to Ben, Andrew, David and Chris (23,14,7,8)

Both Ben’s and Andrews numbers are even. Both Andrews in David’s numbers are less than 10. What number is on Chris’s jersey?

Answer 1

John,

Since Ben and Andrew have the two even numbers, Chris’s must be odd.

Since Andrew and David have the small numbers (That is, less than 10), Chris’s must be larger.

There’s only one number that is both large and odd.