Monthly Archives: May 2018

DAY 152:

The Main Challenge Using the three numbers 1, 2 and 4 just once each, with + – × ÷ available to you, what is the lowest positive number it is NOT possible to make? The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

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DAY 151:

The Main Challenge Solve all four lines arithmetically by replacing the 16 ◯ ‘s below with digits 0-9, but each digit must only be inserted a maximum of TWICE in the whole challenge: ◯  +  ◯   =     8   … Continue reading

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DAY 150:

The Main Challenge Find the sum of the numbers that remain after eliminating multiples of 3, 5 and 7 from all the odd numbers between 10 and 40. The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing 49 … Continue reading

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