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?

16/2/24

If I were to rearrange the digits 1 – 5, how many of the resulting five-digit numbers would be prime numbers?

eg 12345, 13245, 42153 etc

Puzzle courtesy of Mensa member Peter Hooton

  • Show Answer

None

There are 120 combinations of 1, 2, 3, 4, 5 and ALL 120 are divisible by 3 since 1 + 2 + 3 + 4 + 5 = 15

Puzzles for business use

We are also able to supply puzzle content to businesses, tailored to your needs. This can range from one-off media projects for marketing campaigns and content for newspapers, magazines and company websites, to long-running partnerships and licensing agreements.

Find out more by contacting our marketing team, via: communications@mensa.org.uk