Thursday, 17 July 2025

'Tube Puzzle'

SAW this serial number on a South Western train: 77712.
As usual, each number should be used once, and once only, and must be added, subtracted, multiplied or divided to make a balanced equation.
There is a perfect solution, ie one that uses the numbers in the order they appear.
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My solution: 7 + 7 = 7 x 1 x 2

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