Find out about yourselfJoin Mensa nowBrowse our shop

Mensa Group

Were you previously a member? Rejoin

Are you a member of another National Mensa? Become a Guest member

Mensa Brainteasers

Week 42 - Monday 

What number should replace the question mark?




19 Oct 2017
Reveal answer

6. Starting on the left of each group of circles and moving clockwise, the first number plus the second number, multiplied by the third number gives the fourth and fifth numbers.