Number puzzles with arithmetic operations

Update: Wed 17 Apr 2019 11:46:52 PM CEST

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Here you find several puzzles with numbers and mathematical operations.

 

The number 999

Try to reach the number 999, by just taking the digit 9 six times.
You can use any arithmetic operation.

 

The number 99

How can you decrease the number 99, without subtracting any number?

 

The number 30

Try to reach the number 30, by just using the digit 5 four times.
You can combine any arithmetic operation.

 

 

 

How do you like this puzzle? Is it too difficult? I'm very happy for any feedback...

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