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. CharlesOctober 26, 2011 at 7:47:00 AM GMT+9

    Did you send them an email about this?

    ReplyDelete
  2. Kevin KimOctober 26, 2011 at 9:26:00 AM GMT+9

    Ah shore did.

    ReplyDelete
  3. CharlesOctober 26, 2011 at 7:21:00 PM GMT+9

    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
  4. 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
  5. Kevin KimOctober 27, 2011 at 1:14:00 PM GMT+9

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

    ReplyDelete
  6. CharlesOctober 27, 2011 at 2:25:00 PM GMT+9

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

    ReplyDelete
  7. Kevin KimOctober 28, 2011 at 2:35:00 AM GMT+9

    So it seems.

    ReplyDelete

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