Is k greater than t?

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Source: — Data Sufficiency |

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Re: Is k greater than t?

by Brent@GMATPrepNow » Sun Jun 28, 2020 5:35 am

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BTGModeratorVI wrote:
Sat Jun 27, 2020 6:56 am
Is k greater than t?

(1) kt = 24
(2) k^2 > t^2

Answer: E
Source: Official guide
Target question: Is k greater than t?

When I SCAN the two statements, they both feel insufficient, AND I’m pretty sure I can identify some cases with conflicting answers to the target question. So, I’m going to head straight to……

Statements 1 and 2 combined
There are several values of k and t that satisfy BOTH statements. Here are two:
Case a: k = 24 and t = 1. In this case, the answer to the target question is YES, k is greater than t
Case b: k = -24 and t = -1. In this case, the answer to the target question is NO, k is not greater than t
Since we can't answer the target question with certainty, the combined statements are NOT SUFFICIENT

Answer: E

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Brent
Brent Hanneson - Creator of GMATPrepNow.com
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