if x,y,z are said to be real numbers and xyz=21 is given, can we assume the #s to be 1,3 and 7?.....as real numbers, they can also be 3.5, 2, 3
some one please clarify
some one please clarify
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Real numbers vs integers
Source: Beat The GMAT — Data Sufficiency |
real numbers are any number that is not imaginary. so any decimal, fraction, integer whole number is a real number. The GMAT only deals with real numbers. but in your above question even with integers it is also possible for x, y and z to equal 1, 1, and 21 so you would need a definition of distinct positive integers to ensure you know the values of 1,3 and 7 but then you still woudn't know which variable was which number.
Becky
Master GMAT Instructor
The Princeton Review
Irvine, CA
Master GMAT Instructor
The Princeton Review
Irvine, CA
Becky....yes if the #s are integers, they can be either 1,1,21 or 1,3,7...however if they are only given as real #s (without specifying integers), cant they also be 2,3.5 and 3?tpr-becky wrote:real numbers are any number that is not imaginary. so any decimal, fraction, integer whole number is a real number. The GMAT only deals with real numbers. but in your above question even with integers it is also possible for x, y and z to equal 1, 1, and 21 so you would need a definition of distinct positive integers to ensure you know the values of 1,3 and 7 but then you still woudn't know which variable was which number.
