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Sunday Times Teaser 2958 – Sudoku Crossword

by Danny Roth

Published June 2 2019 (link)

George and Martha are doing a mathematical crossword. There is a 3 x 3 grid with the numbers 1 to 9 inclusive appearing once each. The clues are as follows:


top line: a prime number
middle line: a prime number
bottom line: a prime number


left column: a perfect square
middle column: a perfect square
right column: a prime number

Although you do not need to know this, one of the diagonal three-digit numbers is also prime.

What is the sum of the three “across” numbers?

4 Comments Leave one →
  1. Brian Gladman permalink

  2. GeoffR permalink

  3. GeoffR permalink

    A three stage permutation of the digits produced a much faster solution

  4. Erling Torkildsen permalink

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