Today’s Challenge
Another mini-MATHELONA challenge where you must replace the eight ◯’s below with the eight digits 1, 1, 1, 2, 2, 3, 4 and 5 so both lines work out arithmetically:
◯ + ◯ = 3 = ◯ – ◯
◯ + ◯ = 4 = ◯ × ◯
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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 1st & 4th rows of the playing board contain the following fourteen numbers:
2 3 9 10 14 15 22 32 35 40 44 54 60 72
Which five numbers listed can be made by adding two others from the list?
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Answers
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