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The difficult dial Brainteaser

by David, 4 September 2019 | 3 comments

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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?

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