Today’s Challenge
FOUR is the smallest positive integer that has exactly three factors; these are 1, 2 and 4. When finding the next integer to have exactly three factors, what is the product of these three factors?
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The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up to 84.
The 3rd & 7th rows contain the following fourteen numbers:
4 11 13 24 25 27 30 36 42 45 66 70 77 80
What is the sum of the multiples of 10?
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Answers
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