UKMT Senior Challenge-IX

A box contains seven cards numbered from 301 to 307. Graham picks three cards from the box and then Zoe picks two cards from the remainder. Graham looks at his cards and then says “I know that the sum of the numbers on your cards is even”. What is the sum of the numbers on Graham's cards?

This problem is not original.This problem is part of this set.

×

Problem Loading...

Note Loading...

Set Loading...