Logic puzzles, riddles, math puzzles and brainteasers - pzzls.com

Vandaag is het 17 July 2018

Add using:

Painting stairs - math puzzle

Difficulty: 

   Rating: 2.4/5.0

Share this pzzl:  

To enter the house of the professor, you first have to walk up a stairs which consists out of twenty steps. The professor thinks his stairs are boring so he decides to paint them. He buys two colors, yellow and green.

Every step will be either painted yellow or green and moreover the professor does not want to have two yellow steps directly after each other. In how many ways can the professor paint his stairs? And what is the name of the professor?
stairs

Sky theory - science puzzle

Difficulty: 

   Rating: 3.4/5.0

Share this pzzl:  

Why has the sky most often a blue color? And for what reason becomes the sky becomes suddenly reddish when the sun sets? Why does this red color only appear during a sunset or sunrise and not when it is noon? sky

Know what you want - puzzling puzzle

Difficulty: 

   Rating: 2.7/5.0

Share this pzzl:  

Who makes it, doesn't tell it.
Who gets it, doesn't know it.
Who knows what it is, doesn't want it.

What is it?