Puzzles, Thinking Tests

 

  

 

 

 

Who owns zebra?

① There are five houses, each in with a front door of a different color, and inhabited by people of different nationalities, with different pets and drinks. Each person eats a different kind of food.

② The Chinese lives in the house with the red door... More

  

 

 

 

The problems below are not just brain-teasers: they illustrate principles about
 creative thinking, challenging assumptions, and problem solving.

 

 

Test 1: The Nine Dots

Solutions

Connect up the dots by four straight consecutive lines. Don't retrace or lift your pen off the paper.

Excellent result: if you complete the task within three minutes

 

See the answers

Test 2: The Six Matchsticks

   See the answers

Arrange six matchsticks in a pattern of four equal-sided triangles. You may not break the matchsticks. Find two solutions.

Excellent result: if you find the both solutions within five minutes