# Number puzzles with arithmetic operations

Last update: Tue 16 Aug 2016 04:39:50 PM CEST
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### 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.

## Puzzle solutions

### The number 999

Try to reach the number 999, by just taking the digit 9 six times.

You can use any arithmetic operation.

Solution (1): 9+99 + 9*99

Solution (2): (sqrt(9) + 9) * 9 + 99*9 = 999

### The number 99

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

__Solution:__

The number can be reduced by just turning the digits (vertical flip): 66

### The number 30

Try to reach the number 30, by just using the digit 5 four times.

You can combine any arithmetic operation.

The number 30 with 5 5 5 5:

Solution (1): 55 - (5 * 5) = 30

Solution (2): (5/5 + 5) * 5 = 30

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