If you added 3+6, then to that answer added 9, then 12 . . . and kept on adding consecutive multiples of 3 to the previous total, what is the first answer you would reach that is more than 100?
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 2nd & 6th rows of the playing board contain the following fourteen numbers:
5 8 12 17 18 20 28 33 48 49 55 56 63 64
How many prime numbers and square numbers are listed altogether?
Answers can be found here.
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