Sunday, 5 July 2026

Tube Puzzle

SAW this serial number on a Northern Line carriage: 51667.
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: 5 + 1 + (6 ÷ 6) = 7

8 comments:

  1. (5+1)/6+6=7 (with greetings from Berlin)

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  2. 5/1 - 6 = 6 - 7 (with greetings from Berlin V2 ;.) )

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  3. 5*1 - 6 = 6 - 7 - another trick from Berlin :-)

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  4. 5/1 - 6 = 6 - 7 and more ad more from Berlin....

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  5. 5 - 1*6 = 6 - 7 ...last waltz from Berlin - have fun in Magdeburg!

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