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31 Oct 2022, 01:33
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Thanks Brent BrentGMATPrepNow for the great explanation. What a brain twist of GMAT questions .
To clarify, this question is given (If 2^(x + y) = 4^8, what is the value of y?) therefore we can then use the conclude info x + y = 16 to apply to the 1,2 statements.
Whereas this question https://gmatclub.com/forum/is-4-x-y-8-1%20...%2039120.html, we aren't given any information.
Instead we have the target question "Is 4^(x+y) = 8^10?" Therefore we can't use the conclude info of x+y=15 to apply to the statements 1 & 2.
Thanks Brent.
To clarify, this question is given (If 2^(x + y) = 4^8, what is the value of y?) therefore we can then use the conclude info x + y = 16 to apply to the 1,2 statements.
Whereas this question https://gmatclub.com/forum/is-4-x-y-8-1%20...%2039120.html, we aren't given any information.
Instead we have the target question "Is 4^(x+y) = 8^10?" Therefore we can't use the conclude info of x+y=15 to apply to the statements 1 & 2.
Thanks Brent.
31 Oct 2022, 12:55
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Kimberly77
That's correct.
In general, given information can be applied to each statement, whereas the target question it's simply that: A question we are trying to answer.
31 Oct 2022, 14:57
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