When are clock hands at right angles?
Published , last checked . Re-solved cold against the published wording before it went live: how puzzles and answers are checked.
How many times do the hour and minute hands form a right angle between noon and midnight? From the free puzzle set on Think Fanny. Next try Odd one out: 3, 5, 7, 9, 11, 13.
Check the clock maths yourself
The count of 22 is a known result rather than our arithmetic, so here is where to verify it and where the mechanism behind it is explained:
If one of these contradicts the answer above, we would rather hear it than not. See how puzzles and answers are checked.