Today’s Challenge
Try the following MATHELONA challenge by inserting the digits 0, 1, 1, 2, 3, 3, 4, 4, 5, 6, 7 and 7 into the 12 gaps below and making all three lines work out arithmetically.
◯ + ◯ = 4 = ◯ – ◯
◯ + ◯ = 12 = ◯ × ◯
◯ + ◯ = 1 = ◯ ÷ ◯
Further details of our popular pocket book can be found by clicking MATHELONA.
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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 & 5th columns of the playing board contain the following fourteen numbers:
8 11 13 14 18 21 22 25 27 44 55 56 60 84
How many pairs of numbers have a difference of 33?
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Answers
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