public educationDerb posted the following math problem in The Corner: "This is one Nellie (5th grade) brought home from school. (Which raises my spirits a bit about the quality of education she is getting.) A, B, and C stand for different digits. Multiply AB by C, the product is BBB; what do A, B, and C stand for? I did it by eye in around 20 sec, then coaxed Nellie through it Socratic-style in 5 minutes or so, and we both felt pleased with ourselves." I've looked at it for about a minute, and I think I have the solution. Someone please correct me if I'm wrong. We know that AB x C = BBB But doesn't AB stand for (A x B)? So the Problem is A x B x C = B x B x B or ABC = BBB. If A, B, and C are different digits, doesn't this problem only work if B is Zero? A and C can be whatever number they chose, because when you multiply any number by zero you always get zero. Someone give me a gold star! |
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