
Sergei Kruglov  20070710 12:10:02 
Is solving of mathematical expresstions hard for a computer? No. This is his main task  calculate of math. 

2. Re: Is solving of mathematical expresstions hard for a computer? 

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m  20070710 13:49:43  In reply to message 1 from Sergei Kruglov 
You are right. This is not even a Turing's test (to separate a human from a computer), but in most cases this simple math works and people are less annoyed with this than the captcha mechanism. 

3. Re: Is solving of mathematical expresstions hard for a computer? 

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Sergei Kruglov  20070710 18:17:35  In reply to message 2 from m 
People more annoying when no captcha absolutely.
But bots are "happy" too.
Your solution can be solved by blind users, but by bot too. 
