Tuesday, October 25, 2011

I cry FOUL!

Regarding the solution to last week's MGRE Math Beast Challenge problem: I see a serious mistake that alters the nature of the answer. Here's a copy of MGRE's explanation for why the answer to last week's problem isn't D:



Notice anything?

The answer explanation assumes that the numerator of the fraction in Quantity B is a factorial!

Congratulations to whoever won last week's contest; they're not to blame for MGRE's mistake. But readers of this blog will recall that I was explicit in noticing that Quantity B's numerator was decidedly not a factorial, which made all the difference. And that's why I chose D.

So, yeah: I cry foul.


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7 comments:

  1. Did you send them an email about this?

    ReplyDelete
  2. I'll be interested in hearing what they have to say.

    Maybe they'll be so impressed with your awesomeness that they will offer you a job on the spot.

    ReplyDelete
  3. Tom Williams // Manhattan PrepOctober 27, 2011 at 3:29:00 AM GMT+9

    Thanks for the catch, Kevin. I've got one of our instructors writing up a response right now. It should be up on our blog within a day or so. I'll let you all know when it's up.

    ReplyDelete
  4. Thanks, Tom. And thanks, Charles, but I doubt they'll let me through the door without making me jump a few hoops first.

    ReplyDelete
  5. There are always hoops, aren't there...

    ReplyDelete

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