chmod -R +x $(awk -v min=1 -v max=100 'BEGIN{srand(); print int(min+rand()*(max-min+1))}')

Change the permissions of all files and folders recursively to executable, using a random number between 1 and 100.
chmod -R +x $(awk -v min=1 -v max=100 'BEGIN{srand(); print int(min+rand()*(max-min+1))}')