Calvin and Hobbes by Bill Watterson for September 27, 1990
Calvin: How can our time be up?! I just did the first problem on this quiz! Where did the time go?? Guess! Guess! Pick random numbers! Maybe a few will be right by sheer luck! 15! 104! 3! 27! Miss Wormwood: Hand it in, Calvin. Your time's up. Susie Derkins: Don't forget we have a bet on who gets the higher grade. Calvin: The bet's off! I don't gamble! No bets!