Yes, it is C, though your first equation should read x+k = 2. If you solve, you should find x=2 and k=0.jeffxujian wrote:Ian:Ian Stewart wrote:I'm pretty sure Q3 is supposed to read:
Q3. Is x>k?
1. (2^x)(2^k)=4
2. (9^x)(3^k)=81.
Then the statements are not contradictory.
Is the correct answer of the above question C?
1. x+k=4 insufficient, because x, k can be any numbers
2.2x+k=4 insufficient, same drill as above
combine 1 with 2, x=0 and K=4, thus the result is sufficient to answer question whether x is greater than k.
Please correct me if i made any mistakes. Thank!
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please help me with these tricky DS
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Ian Stewart
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Hi, Ian
Thanks for the correction. I believe that is also something for which i should watch out on the GMAT.
Thanks for the correction. I believe that is also something for which i should watch out on the GMAT.
Can somone verify answer to Q3. Is it C or Esaeed wrote: Q3. Is x>k?
1. (2x)(2k)=4
2. (9x)(3k)=81.
Please help me with most efficient approach.
Thanks in advance.
how is it that you arrived at the x+k=4 and 2x+k=4?
Ian Stewart wrote:Yes, it is C, though your first equation should read x+k = 2. If you solve, you should find x=2 and k=0.jeffxujian wrote:Ian:Ian Stewart wrote:I'm pretty sure Q3 is supposed to read:
Q3. Is x>k?
1. (2^x)(2^k)=4
2. (9^x)(3^k)=81.
Then the statements are not contradictory.
Is the correct answer of the above question C?
1. x+k=4 insufficient, because x, k can be any numbers
2.2x+k=4 insufficient, same drill as above
combine 1 with 2, x=0 and K=4, thus the result is sufficient to answer question whether x is greater than k.
Please correct me if i made any mistakes. Thank!
