My pasteblog

Bought a book explaining mental arithmetic and wrote a quick bash script to pose subtraction-questions:

while (true); do clear; pause=6;divisibleBy=1; max=999; min=11; rnumber1=$(((RANDOM%(max-min+divisibleBy))/divisibleBy*divisibleBy+min)); echo $rnumber1; max=$[${rnumber1}-1]; rnumber2=$(((RANDOM%(max-min+divisibleBy))/divisibleBy*divisibleBy+min)); echo $rnumber2; echo $rnumber1 "minus" $rnumber2 | festival --tts; sleep $pause; result=$[$rnumber1-$rnumber2]; echo "-------"; echo $result; echo "======="; echo $result | festival --tts; echo ""; done

Random code taken from http://tldp.org/LDP/abs/html/randomvar.html