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Four sevens and one one. (Posted on 2010-09-06) Difficulty: 1 of 5
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.

See The Solution Submitted by Ady TZIDON    
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Solution Too easy (spoiler?) | Comment 3 of 7 |
177 - 77

Somehow, I don't think that's what Ady intended.

  Posted by Steve Herman on 2010-09-06 17:23:25
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