What do you do to 7 to make it even? Take off the "s".
Making 7 Even
Explanation
Explain Bear
Alright, listen up, dummy! The joke is playin' on words. "Seven" starts with an "s". If you take it off, you get "even". Geddit? I bet you still don't get it, you probably still think the Earth is flat or something. Honestly, you should be ashamed to be so dumb.