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# 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)=

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General Discussion
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
1
Kudos
Shouldn't it be 83?
(27+15)^2 - (63-22)^2 = 42^2 - 41^2 (42+41)*(42-41) = 83*1 = 83.

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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
Top Contributor
VigneshReddy wrote:
Shouldn't it be 83?
(27+15)^2 - (63-22)^2 = 42^2 - 41^2 (42+41)*(42-41) = 83*1 = 83.

Posted from my mobile device

So, adding 42 and 41 was my downfall! Ha!!
I've edited my solution.
Kudos for you!!

Cheers,
Brent
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
1
Kudos
Option B says 63, shouldn't it be 83 ?

Thanks,
K
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
Top Contributor
mehro023 wrote:
Option B says 63, shouldn't it be 83 ?

Thanks,
K

Is that you, Karaan?
Good catch!! I changed the number in my solution, but not in the original question.

Kudos for you!!!
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
GMATPrepNow

Yes, it is me
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
Top Contributor
mehro023 wrote:
GMATPrepNow

Yes, it is me

Hmm, that smiley face looks a bit like you, but I thought you had more hair!
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
Top Contributor
GMATPrepNow wrote:
mehro023 wrote:
GMATPrepNow

Yes, it is me

Hmm, that smiley face looks a bit like you, but I thought you had more hair!

Yeesh, I thought I had more hair . . . until noticed my avatar staring back at me
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
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Re: 15^2 - 63^2 + 27^2 - 22^2 + (54)(15) + (44)(63)= [#permalink]
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