Critical Thinking Puzzles

A ten meter rope is looped through a pulley attached to the ceiling. Half the rope dangles on one side, the other half on the other. At one ...

FACTS OF THE PUZZLE [This quiz was made up by Albert Einstein and according to him 98% will not solve it.] There are five houses in five dif...

You have a 3-quart bucket, a 5-quart bucket, and an infinite "supply of water. How can you measure out exactly 4 quarts?

You have two jars and 100 marbles. Fifty of the marbles are red, and 50 are blue. One of the jars will be chosen at random, then 1 marble wi...

There are four dogs, each at a corner of a large square. Each of the dogs begins chasing the dog clockwise from it. All of the dogs run at t...

How do you cut a rectangular cake into two equal pieces when someone has already removed a rectangular piece from it? The removed piece can ...

Mike and Todd have $21 between them. Mike has $20 more than Todd. How much does each have?