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Puzzle of the Day

These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.

Below are some girls and boys first names. They are in code. Each digit always stands for the same letter. Try and work out the names: 900 340 323 1277 123415 890 464 What does 31890 stands for?

Answer: ANN, BEN, BOB, ROSS, ROBERT, IAN, EVE, BRIAN