Today’s Challenge
A number puzzle to test your subtracting skills and knowledge of prime numbers.
Start at 100 and keep on subtracting consecutive prime numbers (first 2, then 3, followed by 5 . . . and so on). What is the first answer that goes below 50?
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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 & 6th rows of the playing board contain the following fourteen numbers:
5 12 13 18 20 25 33 36 42 45 49 56 66 80
From the list, what is the sum of the multiples of 7?
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Answers
. . . can be found when clicking this.
