Make the number 48 with the numbers 1, 6, 7, 8.

Do I have to use every number?

Yes, I forgot that rule!

Make the number 48 with the numbers 1, 6, 7, 8.

[8 x 6] / [1^7] =48

the problem says you can't use exponents

Don't worry my math teacher said it's supposed to be hard. I gave up after like 1.5 hours!

Make the number 48 with the numbers 1, 6, 7, 8.

Only use addition, subtraction, multiplication, and division.

You can use each number once!

see: http://web2.0calc.com/questions/help_40217