Compute four 9’s to equal 10

[NOBama]

Using any combination of mathematical operators.

 

[Jon]

(99-9)/9 = 10

also

99/9.9 = 10

 

[NOBama]

Nope...

99 is not 9

9.9 is not 9

Nice try though

 

[editec]

((9x9) + 9)/ 9 =10

 

[Jon]

Nope...

99 is not 9

9.9 is not 9

Nice try though

This is an old trick that my math teachers used to do in high school. 99 and 9.9 were acceptable because of the wording of the question. I knew the answer you wanted, but it was more fun to mix up the problem because of the ambiguity.