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Puzzle #218: Can you work out how many children are in each group?

Can you solve this week’s arithmetical puzzle, Playground parity? Plus the answer to puzzle #217

19 April 2023

#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 …

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