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Random Puzzles 


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Puzzle 1 


Looking at a usual clock, how many times …

… does the minute hand pass the hour hand between midday and midnight?

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Puzzle 2 


Below are safari animals, however, each letter has been replaced by its position in the alphabet, but the spaces between the resulting numbers have been removed.

For example, DOG = 4 15 7 = 4157.

What are the safari animals?

18891415 3181531549125 79181665 38552018 12515161184 89161615 512516811420 2216611215 1291514

Puzzle Copyright © Kevin Stone

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Puzzle 3 


all matchstick puzzles

Can you make this equation correct by moving exactly one matchstick?

19 + 6 = 21

Note: this puzzle is not interactive, and the matchsticks cannot be moved. The matchstick layouts for each digit are:

Default Digits

Puzzle Copyright © Kevin Stone

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Puzzle 4 


What is the 10th prime number?

2, 3, 5, 7, …

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