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Random Puzzles 


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Puzzle 1 


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 2 


You have a very large number of generic plastic building blocks, each in the shape of a cube.

Think about how many cubes you would need in order to construct a giant cube with 16 small cubes along each edge.

If you were to then remove the outside layer, how many small cubes would you have removed?

Puzzle Copyright © Kevin Stone

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Puzzle 3 


I have a jar of sweets.

There are 234 red, 26 blue, 67 green and 63 yellow sweets.

What chance do I have of picking a blue one with my eyes shut?

Puzzle Copyright © Kevin Stone

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Puzzle 4 


I am a nine-letter word (123456789).

From 6523 grows a plant.

I 689, I 689, I 689, it's no joke.

751 rhymes with you.

421 rhymes too!

What am I?

Puzzle Copyright © Kevin Stone

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