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If y ≠ 3 and 3x/y is a prime integer greater than 2, [#permalink]
05 Feb 2006, 07:02

If y ≠ 3 and 3x/y is a prime integer greater than 2, which of the following must be true?
Ⅰ. x = y
Ⅱ. y = 1
Ⅲ. x and y are prime integers.
(A) None
(B) Ⅰ only
(C) Ⅱonly
(D) Ⅲonly
(E) Ⅰand Ⅲ

Quote:

Sorry, the 2 problems which i posted, i overlooked the errors ! sorry again! pls help now

well arch! even i picked B , but the OA for this was A ) none! i guess the answer is wrong... or we both sailing in the same boat! ( wrong boat) _________________

well arch! even i picked B , but the OA for this was A ) none! i guess the answer is wrong... or we both sailing in the same boat! ( wrong boat)

raz,

I aslo end up with B. Agree with thearch's working.

I think we are sailing in the right boat but OA is incorrect _________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

well arch! even i picked B , but the OA for this was A ) none! i guess the answer is wrong... or we both sailing in the same boat! ( wrong boat)

raz,

I aslo end up with B. Agree with thearch's working.

I think we are sailing in the right boat but OA is incorrect

I do hope that these problems with incorrect OAs don't come from the OG...
otherwise we would be in the right boat sailing away from an 800 _________________

Please allow me to introduce myself: I'm a man of wealth and taste

otherwise we would be in the right boat sailing away from an 800

Well it depends how far away your are sialing from the 800 boat. For me if I am sailing away from 800 boat, but close enough to 700, I'll take that boat! _________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

First I solved incorrectly and came up with answer E.. (1 is not prime..did not remember that point)

But second mistake I made, which I alwasy do is to assume x and y are integer.... if you dont assume that than lets say

3x/y = 2 => x/y = 3/2 we can have x =1 and y =2/3 and x = 6 and y = 4 or x=3 and y=2 which all will result in Prime integer...

and this will result NONE as answer!

it's always easy to solve problem once you know the answer !

Hmm. I get it now. I just assumed x and y are integers _________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

I´ve done an interview at Accepted.com quite a while ago and if any of you are interested, here is the link . I´m through my preparation of my second...

It’s here. Internship season. The key is on searching and applying for the jobs that you feel confident working on, not doing something out of pressure. Rotman has...