logic puzzles, riddles and math puzzles - pzzls | keep the money rolling puzzle

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On this site you'll find lots of logic puzzles and riddles, puzzling riddles,
science puzzles and math puzzles and riddles.

Answers and detailed solutions are included.

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math puzzle

Keep the money rolling

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?

mail puzzle

rating 2.7/5

answer - solution

puzzle top 10

1.	Einstein's riddle	logic puzzle	rating: 3.8/5


2.	Lockers	math puzzle	rating: 3.6/5


3.	Divisible from 1 to 9	math puzzle	rating: 3.6/5


4.	Lost your way	logic puzzle	rating: 3.5/5


5.	Find the way to freedom	logic puzzle	rating: 3.5/5


6.	The superstitious president	logic puzzle	rating: 3.4/5


7.	Dots and lines	logic puzzle	rating: 3.4/5


8.	Address unknown	logic puzzle	rating: 3.4/5


9.	Straight line sum	math puzzle	rating: 3.3/5


10.	Bob and John	math puzzle	rating: 3.3/5

Last changed 16-01-2010