D
Statement 1
Sufficient - yes

Statement 2
Sufficient-no is the answer to the question stem

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St 1: 1/s^3 = t/u
rearranging, 1/s = s^2 x t/u. same expression. will always hold true. ANSWER

St 2: s^3 = ut. therefore 1/s = s^2 x 1/ut. not the sameexpression, but will hold true if t = 1. INSUFFICIENT

Option A

If the statement gives t is not equal to 1, then the answer would be D ?

not even then B would be sufficient.

what if t = -1? In this case as well t^2 will be 1. so with statement-2 along with information as t not equal 1, B will not be sufficient.
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VERITAS PREP OFFICIAL SOLUTION:

Correct Answer: A

Explanation: To simplify the question, it may be helpful to rewrite the question stem by cross-multiplying both sides of the equation to arrive at \(s^3t = u\).

Therefore, the question may be rephrased: Is \(s^3t=u\)?
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Isn't statement 1 and statement 2 contradicting each other ?


statement 1 -> \(s ^3\) =\(\frac {u}{t}\)
statement 2 -> \(s^3\) = ut

Am i missing anything ?
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Bunuel

How is the 2nd statement not sufficient? We are able to answer the question right?Also, as someone mentioned above, the two statements never contradict each other in official questions. Atleast I have not seen any such question.

Hello

Please look at the following solution to this question:
https://gmatclub.com/forum/is-1-s-s-2-t ... l#p1817685

Second statement is not the same as first statement, but if t=1, then answer to the question stem will be YES
but if t is not 1, then answer to the question stem will be NO
So the second statement is not sufficient to answer the question

Correct Answer: A

Explanation: To simplify the question, it may be helpful to rewrite the question stem by cross-multiplying both sides of the equation to arrive at \(s^3t = u\).

Therefore, the question may be rephrased: Is \(s^3t=u\)?[/quote]
Bunuel

How is the 2nd statement not sufficient? We are able to answer the question right?Also, as someone mentioned above, the two statements never contradict each other in official questions. Atleast I have not seen any such question.[/quote]

Hello

Please look at the following solution to this question:
https://gmatclub.com/forum/is-1-s-s-2-t ... l#p1817685

Second statement is not the same as first statement, but if t=1, then answer to the question stem will be YES
but if t is not 1, then answer to the question stem will be NO
So the second statement is not sufficient to answer the question[/quote]

Thanks for sharing the link-quick couple of qs
1. In St 2, cant be just take reciprocal on both sides and check?
2. You did not talk about the two statements contradicting each other. Any official question you can share where this is happening?