Let your computer guess your answer

Pick a two digit number between 10 to 100. Do the sum of two digits of the number and subtract it from the original number.
Example: My two digit number is 34.
Sum of two digits of the number is 3 + 4 = 7.
Now substract the number 7 from 34 i.e. 34 -7 = 27.


Look for the answer in the table and concentrate on the corresponding sign.
Click on the button to see if your answer corresponds to computer's random guess.



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100
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