Become a member

My Mensa
Become a member
My Mensa
9109_Mensa_80 logo_FINAL
Facebook Twitter Linkedin

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?

23/12/24 – Seven Dwarves

How many of the seven dwarves are lying?

(There are two solutions)

BASHFUL: “At least 1 of us is lying”

DOC: “At least 2 of us are lying”

DOPEY: “At least 3 of us are lying”

GRUMPY: “At least 4 of us are lying”

HAPPY: “The dwarf whose surname is not an adjective is lying”

SLEEPY: “An odd number of dwarves are lying”

SNEEZY: “An even number of dwarves are lying”

Puzzle courtesy of Mensa member Peter Hooton

  • Show Answer

4 or 5

Clues 1-4 are contradictory so at least three, if not four dwarves are lying.
Therefore, Doc can’t be telling the truth, so Happy is. Either Sleepy or Sneezy is lying. Thus either 4 or 5 dwarves are lying. Either 4 dwarves are lying; Sneezy, Happy and Grumpy are telling the truth or 5 dwarves are lying; Happy and Sleepy are telling the truth.

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