Daily Archives: September 24, 2019

DAY/DYDD 267:

The Main Challenge Using all four numbers 1, 5, 5 and 10 once each, with + – × ÷ available in each calculation, which even number from 2 to 20 inclusive is impossible to make? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 … Continue reading

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