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2025-12-04
Christmas card 2025
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2026-01-18
Will you be posting solutions? I have what is to me an acceptable answer but I think I might be missing a couple of squaresEwan Leeming
Thanks again for an advent full of brain teasers. Merry Christmas!×2
Gert-Jan
×2 Is there a word missing (positive?) from Q9? Surely any positive integer, n, can be written as the sum of the consecutive integers -(n-1),...,-1,0,1,...,n-1,n.
Alec
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