Problem 3 -Data Sufficiency

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by Rich@VeritasPrep » Thu Jul 01, 2010 7:28 am
"Is x/5 an integer?" translates to "Is x a multiple of 5?"

Statement (1) tells us that x is a multiple of a multiple of 5. Therefore, x is a multiple of 5. SUFFICIENT

Statement (2) doesn't give us enough. x might be a mutiple of 5, but it might not. For example, x=336 is not a multiple of 5, but x=336*5 is a multiple of 5. INSUFFICIENT
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by ayushiiitm » Thu Jul 01, 2010 7:32 am
er.twi.fb wrote:3.25. Is x/5 an integer?

(1)x/12,345 is an integer.
(2)x/336 is an integer.
The property to remember here is

if x is a factor of y and y is a factor of z then x is a factor of z

from stem 1 >> if 5 is a factor of 12345 and 12345 is a factor of x, then 5 is a factor of x so sufficient

from stem 2>> 336 is factor of x and 5 is not a factor of 336 so x/5 will not be an integer ....sufficient

imo D
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by ayushiiitm » Thu Jul 01, 2010 7:48 am
ayushiiitm wrote:
er.twi.fb wrote:3.25. Is x/5 an integer?

(1)x/12,345 is an integer.
(2)x/336 is an integer.
The property to remember here is

if x is a factor of y and y is a factor of z then x is a factor of z

from stem 1 >> if 5 is a factor of 12345 and 12345 is a factor of x, then 5 is a factor of x so sufficient

from stem 2>> 336 is factor of x and 5 is not a factor of 336 so x/5 will not be an integer ....sufficient

imo D
Thanks Raz , I missed that

IMO B
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