Puzzles



Ruby Redfort's Spy Mystery 24 February 18

In the spirit of Inspector Morse, an Oxford don solved the mystery of a seemingly flawed puzzle.

From Aardvark to Zebra 10 February 18

A variant on a classic H.E.Dudeney puzzle

Who have more sisters: boys or girls? 18 January 18

If you are spending time with siblings this Christmas, ponder this question: on average who have more sisters, boys or girls?

What's the difference between a puzzle and a maths question? 24 September 17

For most people, puzzles and maths questions provoke very different reactions. But what is the difference?

If ABC goes to ABD.... 16 March 17

Where do Ideas come from? This puzzle gives a clue.

Sleeping Beauty 12 February 17

A puzzle much debated by probabilists has recently resurfaced.

Russian Roulette with a pack of cards 6 July 16

Fifty-two of you have been captured by an evil tyrant with a taste for Russian Roulette. Can you escape?

The puzzle of the two Black Queens 4 September 15

A puzzle with an answer many people will find counterintuitive.

Heathrow Airport and the Travelator Problem 11 May 15

A real life puzzle with an answer that isn't obvious.

Cheryl and the Perfect Logicians 13 April 15

The Cheryl birthday puzzle that recently went viral has opened a can of worms.

The Curious Popularity of Mackerel Questions 6 April 15

A trivia question that led to the pastime of Tubewhacking

The Irksome Tuesday Boy Problem 3 November 13

The answer to this 'classic' puzzle depends entirely on the motives of the person who poses it.

The Sloppy Monty Hall Puzzle 9 September 13

The Monty Hall puzzle is rarely presented properly

The Ice Cream Puzzle 22 July 13

Teenagers and students understandably find this puzzle hard. What's worrying is they don't check their answer makes sense.