Saturday, 18 April 2026

Tricky Brain Exercise

SAW this serial number on a Central Line carriage: 92136.
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, but it is far from obvious.
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My solution: 9 ÷ (2 + 1) + 3 = 6

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