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I saw a number trick recently & wondered whether you had come across it yourself - & more importantly can you tell me how it's done!?

Picking a number between 34 & 99 (apparently it doesn't work outside this perimeter) a 4x4 grid is created into which numbers are inserted. The result is a full grid where any block of 4 squares equals the chosen number - any horizontal line of 4=the chosen number, any vertical line of 4=the chosen number, any 2x2 grid=the chosen number etc.

Have you come across this before?

I await your reply with interest.

Kind regards,

Tim Warner, UK.

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