The problem posed was this.

*In this grid the three numbers in each row, column and main diagonal must add up to the same total. Find the missing numbers.*

22 | 14 | |

0 | 25 |

This is tricky! So here's a big hint for getting into it.

The number in the shaded square below must be equal to 22 + 14 – 25. But can you work out why?

22 | 14 | |

0 | 25 |

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