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Random Puzzles


Difficulty: EasyPuzzle 1

Take a normal piece of paper, exactly 0.1 mm thick.

Fold it in half, and then in half again, and again, and again.

Do this a total of 50 times.

How thick would the final paper be (if this could be done)?

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[Ref: ZOPB]  


Difficulty: EasyPuzzle 2

Which are there more of: fathoms in a kilometre or hours in a month?

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[Ref: ZBZL] © Kevin Stone 


Difficulty: HardPuzzle 3

What is the largest number which can be obtained as the product of positive integers which add up to 100?

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[Ref: ZKEJ]  


Difficulty: MediumPuzzle 4

Puzzle IconUsing the digits 1 to 9, each once only, create three 3 digit numbers.

Your goal is to create three numbers which, when multiplied together, give the lowest value.

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[Ref: ZDZL]  

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