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

Vandaag is het 27 June 2019

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# 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?

# Marching men - math puzzle

Difficulty:

Rating: 2.7/5.0

A long and straight row of soldiers is marching with constant speed. The dog of the commander runs along the row from the end till the beginning, from the beginning till the end, from the end till the beginning etc. This takes always 2 minutes, 1 minute, 2 minutes, etc.
At some point the soldiers have to pass a very small bridge. However, the commander does not trust the strength bridge completely. He wonders how much time it will take them to pass the bridge when they stay marching with the same speed. How much time is that?

# Four vagabonds - math puzzle

Difficulty:

Rating: 2.7/5.0