Alan Richmond

Puzzles

General Puzzles

Rubik's Cube

A man who lives on the tenth floor takes the lift down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in …

Logic Puzzles

By Cmglee (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
Logic, The Anatomy of Thought

Knaves and Knights

An island is inhabited by two classes of people: knights, who make only true statements, and knaves, who make only false statements. Three inhabitants are conversing. Alfred says, “All of us are knaves.” Bert says, …

Lateral Thinking Puzzles

Rodin's Thinker

Be prepared to think outside the box for these classic lateral thinking puzzles. Enjoy!

Three Switches and Three Bulbs

Three switches outside a windowless room are connected to three light bulbs inside the room. How can you determine which switch …