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Random Puzzles 


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Puzzle 1 


All Matchstick Puzzles

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

5 + 5 = 4

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 2 


By changing the second letter of each of the words below, can you make another valid word?

You have to change each word such that the second letters will reveal a ten-letter word when read downwards.

Therefore, what now reads 'craihruane' will be a real word.
icon crew farm oily chop arid fund wait gnat tear

Puzzle Copyright © Kevin Stone

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Puzzle 3 


What is the smallest positive integer, which …

… when multiplied by 7 gives a number consisting of only 6's?

Puzzle Copyright © Kevin Stone

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Puzzle 4 


Last week my wife and I found ourselves stranded on an island, oops!

Unfortunately, we were also stranded with our two sons, with no clear means of rescue.

Luckily, I came across an old rickety boat which I knew could carry either one adult or two children.

How did I rescue my family?

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