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Just a tiny addition (Posted on 2014-11-18) Difficulty: 2 of 5
Wihout changing the order, add a single digit or a mathematical sign (but not both) to make true the expression below:

(71-1)*(71+1)=7

See The Solution Submitted by Ady TZIDON    
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  Subject Author Date
Solutionanswer(s)Dej Mar2014-11-19 07:15:04
Hints/Tipsre(3): digit 3?Ady TZIDON2014-11-19 00:42:24
Solutionre(2): digit 3?broll2014-11-18 23:48:20
re: digit 3?Benny2014-11-18 23:46:43
digit 3?Benny2014-11-18 23:44:49
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