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The difficult dial

By David, 4 September 2019 Brainteaser

While working on an old weaving machine, Aisha spied a dial that needed repairing.
The dial had numbers counting upwards, evenly spaced around the outside. Although she couldn’t see the whole dial, she could see that the number 6 was directly opposite 17.
Can you work out how many numbers there are on the dial?

Scroll down for the answer!


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Brainteaser answer

If the numbers are evenly spaced, there will be the same amount between 6 and 17, whichever way you go.
There are ten numbers between 6 and 17, so there must be ten between 17 and 6. Adding in both 17 and 6, there must be 22 numbers in total!

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