Today’s Challenge
From all odd numbers in the range 1-23 inclusive, eliminate all prime numbers and multiples of 3. Which number is the only one that remains?
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The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.
The 3rd & 4th rows of the playing board contain the following fourteen numbers:
3 10 13 25 32 35 36 42 44 45 54 60 66 80
Which is the only number that, when adding 10 to it, becomes a square number?
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Answers
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