If X and Y are different prime numbers each greater than 2, which of the following must be true?
1. X + Y not equal to 73
2. XY is an odd integer
3. X/Y is not an integer
A. 2 only
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
E. 1, 2 and 3
Prime numbers
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- sivaelectric
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1. X + Y not equal to 73 - True as X and Y should both be odd and sum should be even.
2. XY is an odd integer - True as X and Y are both odd and product should be odd
3. X/Y is not an integer - True as X and Y are different and are primes.
IMO E
2. XY is an odd integer - True as X and Y are both odd and product should be odd
3. X/Y is not an integer - True as X and Y are different and are primes.
IMO E
- galaxian
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It should be E
As except 2 all prime nos are Odd.
hence,
1. odd + odd = has to be even, can never be 91
2. odd*odd = odd
3. prime no/ prime no can never be a whole integer.
As except 2 all prime nos are Odd.
hence,
1. odd + odd = has to be even, can never be 91
2. odd*odd = odd
3. prime no/ prime no can never be a whole integer.
- sivaelectric
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Hey Galaxian, I have mentioned 73 and not 91. Where did that number come from? ![Smile :)](./images/smilies/smile.png)
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- galaxian
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Lol
I found a similar Qs here :
https://www.urch.com/forums/gmat-problem ... mbers.html
But am sure,given the difficulty level of this problem, you dont think I got the ans from here, do you ?![Smile :)](./images/smilies/smile.png)
I found a similar Qs here :
https://www.urch.com/forums/gmat-problem ... mbers.html
But am sure,given the difficulty level of this problem, you dont think I got the ans from here, do you ?
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- cans
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X,Y odd prime numbers.If X and Y are different prime numbers each greater than 2, which of the following must be true?
1. X + Y not equal to 73
2. XY is an odd integer
3. X/Y is not an integer
thus X+Y will be even (odd+odd=even) Thus 1 will always be true.
X is odd and Y is odd. Thus XY is odd. 2 will be always true.
X/Y are prime and are different. Thus not an integer. True
thus all 1,2,3 all are true
IMO E
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Cans!!
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Cans!!
- sivaelectric
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@Galaxian Defn No.
lol
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- jainnikhil02
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IMO E
Nikhil K Jain
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