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# A Nine Puzzle

## Question

Use three 9's and arrange them using the mathematical signs to form the number one.

There is a subtraction sign.

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## Recommended Posts

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9

9-9
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((9 - 9)9)! = 1

Edited by bonanova
Tagging as solved since author seems to have left the forum. This gets it off the unsolved list.

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9^(9-9)=1

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9/9

9
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9/9

9

did you mean (9/9)^9 if it is then it is correct...There are many possible combinations...i wanted the one with subtraction sign...

Edited by Debasis
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(9*(9 - 9))! = 1

((9 - 9)/9)! = 1

I was looking for the square root symbol to do:

(9 - sqrt(9*9))! = 1

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(sqrt(9)*sqrt(9))/9

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BMAD, I purposely did not include any solution like yours, because the OP in post # 1 and post # 5

stated that he/she wanted a subtraction sign used among the mathematical signs.

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The solution given by user skca was already given as its equivalent in post #2 by a different user.

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9(9 - 9)! = 9

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