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

10 comments:

  1. or 9 x 2 = 1 x 3 x 6

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  2. Another solution is 9 / (2 - 1) = 3 + 6

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  3. Similar to Derek's solution is 9 x 2 x 1 = 3 x 6

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    Replies
    1. Hmm - it's beginning to seem it wasn't such a tricky puzzle after all ...

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  4. O man, how many hours have one day in your life? With greetings from Berlin, Michael

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  5. ... send from Berlin: 9x2/1=3x6 Michael

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