Considering all odd numbers from 1 through to 23, eliminate all single-digit numbers and multiples of 7 as well as numbers that have their two digits adding up to an even number.
Which number is the last one remaining?
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 5th & 7th rows of the playing board contain the following fourteen numbers:
4 6 7 11 16 21 24 27 30 50 70 77 81 84
From the list, what is the sum of the multiples of 4?
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