Calvin and Hobbes by Bill Watterson for October 25, 1988
Calvin: Hey, Susie, did you have any trouble with our math homework last night? Susie: No, why? Calvin: I thought a couple of these were tricky. Can I check my answers with yours? Susie: Ok. Calvin: Thanks. What did you get for question one? Susie: Seven. Calvin: Seven? Good, that's what I got. What did you get for question two? Susie: Drop dead, Calvin.