One to test your basic adding skills. What is the total of all twenty-two separate digits when listing all whole numbers from 10-20 inclusive?
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 6th & 7th rows of the playing board contain the following fourteen numbers:
4 5 11 12 18 20 24 27 30 33 49 56 70 77
Which is the difference between the two square numbers?
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