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

Vandaag is het 20 April 2024

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# Painting stairs - math puzzle

Difficulty:

Rating: 2.4/5.0

 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?

# Keep the money rolling - math puzzle

Difficulty:

Rating: 2.4/5.0

 You put two 1 dollar coins on a table, such that they touch each other (see the figure). While you fix the lower coin with your finger, you will turn the upper around it (without slipping). Somewhat later the moving coin will be back in his original position. How many rotations on his midpoint did the moving coin make?

# Rat race - math puzzle

Difficulty:

Rating: 2.5/5.0