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Puzzles

One activity that many of our members enjoy is puzzling! You can test yourself for fun with our brainteasers. Our quizzes and conundrums are updated regularly, so do check back on the page for the latest content, and if you get really good at them, why not find out what your IQ is by booking a Mensa Supervised IQ Test?

19/3/24

One Saturday in June, a total of 90 people used a local leisure centre to either swim, go to the gym or do aerobics. The manager collected the following information:

1) The number of females who swam equals the number of females who did aerobics

2) 3/5 of those who used the gym were male

3) 10 of the 28 people who did aerobics were male

4) The ratio of male : female who swam is 1 : 2

How many men used the leisure centre?

Puzzle courtesy of Mensa member Peter Hooton

  • Show Answer

40

Swim Gym Aerobics TOTAL
MALE 9 21 10 40
FEMALE 18 14 18 50
TOTAL 27 35 28 90

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