If x, y , and z are integers, is x/ yz an integer?
A) y is a factor of x more than once.
B) All of the prime factors of z are also factors of y
I believe the answer should be [spoiler]E but OA is C Source: Princeton[/spoiler]
Number Properties DS Question
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Consider the following two cases,sonalibhangay wrote:If x, y , and z are integers, is x/ yz an integer?
A) y is a factor of x more than once.
B) All of the prime factors of z are also factors of y
- x = 4, y = 2, and z = 2 ---> x/yz is an integer
x = 4, y = 2, and z = 4 ---> x/yz is not an integer
The correct answer is E.
Note : The 2nd statement is ambiguous. If it was supposed to mean that if y has n number of 2s or 3s in it, then z also have same number of 2s or 3s in it... The correct answer will be C. However, if someone simply asks, how many prime factors does 8 have? We say one, not three.
Anju Agarwal
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Quant Expert, Gurome
Backup Methods : General guide on plugging, estimation etc.
Wavy Curve Method : Solving complex inequalities in a matter of seconds.
§ GMAT with Gurome § Admissions with Gurome § Career Advising with Gurome §
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