Using four sevens (7,7,7,7) and a one (1) create the number 100.
You can use not more than three out of the usual mathematical operations (+, -, x, /, sqrt and power) and any amount of brackets.

1+7+7+7*7 = 64 = 100 (in base 8)

Posted by Larry on 2010-09-07 09:30:32