Guess: 10 plus 10 equals 10, 10 minus 10 equals 10 If you can guess, you're great! One of the professors couldn't guess~

Guess: 10 plus 10 equals 10, 10 minus 10 equals 10 If you can guess, you're great! One of the professors couldn't guess~

Wearing gloves is ten fingers,
Take off gloves or ten fingers