#218 Playground parity
Set by Katie Steckles
I was eating a sandwich on a park bench when a horde of children from the local school descended on the playground in front of me and divided into two groups.
I couldn’t help overhearing the kids by the swings shout across to the kids near the climbing frame: “If two of you run over here, our group will be double yours!”
The kids by the climbing frame replied: “But if two of you come over here, the groups will be the same size!”
The mathematician in me couldn’t resist figuring out how …