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M26-37

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Manager
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Joined: 11 Jan 2018
Posts: 82
Location: United States
GMAT 1: 620 Q46 V30
GPA: 3.32
WE: Operations (Retail)
Re: M26-37  [#permalink]

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New post 06 Sep 2018, 09:37
divinka8 wrote:
For statement B, how were we able to conclude that x + y = 2 as opposed to 1? Technically that would make the RHS equal to 25, also an integer? Of course once you start checking the LHS you would realize no combo of x and y would make it equal to 25 but was wondering if there is a clue before that check is conducted. Thank you!

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I was thinking the same. For #2,

(X+Y) = 2, then 5^ 1 = 5
(X+Y) = 1, then 5^ 2 = 25.

But, if you plug in x=1, y=0 or x=0, y=1, the equation of 2^x + 3^y = 25 will not hold. Therefore, X+Y cannot equal to 1.
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Joined: 31 Jul 2017
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CAT Tests
Re: M26-37  [#permalink]

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New post 07 Sep 2018, 08:16
Even though I got the right answer, I hope not to get such qsns on the real GMAT. It's a great question for practice!
Re: M26-37 &nbs [#permalink] 07 Sep 2018, 08:16

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