To help in our 11/11/11 celebration, today's mentalfloss.com Brain Game offers a related Free-for-all Friday challenge. Good luck!

Using the number "1" exactly SIX times,
and some combination of the four main operators
(addition, subtraction, multiplication, division)
come up with 11 formulas that would equal
each number from 1 to 11.

Example: 11 - 11 + 1 + 1 = 2

Here are some possible SOLUTIONS.

POSSIBLE SOLUTIONS (there are plenty others!):

1 * 1 - 1 - 1 + 1 + 1 = 1
1 + 1 + 1 + 1 - 1 - 1  = 2
11 / 11 + 1 + 1 = 3
1 + 1 + 1 + 1 + 1 - 1 = 4
1 * 1 + 1 + 1 + 1 + 1 = 5
1 + 1 + 1 + 1 + 1 + 1 = 6
11 - 1 - 1 - 1 - 1 = 7
11 * 1 - 1 - 1 - 1 = 8
11 + 1 - 1 - 1 - 1 = 9
11 * 1 + 1 - 1 - 1 = 10
11 + 1 + 1 - 1 - 1 = 11

There are multiple ways to make each calculation using a "1" six times. If you come up with any interesting ones, feel free to share them in the comments.

Join us on Monday for a new Monday Math Square!