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tofu_boi Associate
Joined: 19 Dec 2005 Posts: 1
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Posted: Tue Dec 20, 2005 1:46 am Post subject: Can someone help me on this one? |
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There are x people and y chairs in a room where x and y are positive prime numbers. How many ways can the x people be seated in the y chairs (assuming that each chair can seat exactly one person)?
(1) x + y = 12
(2) There are more chairs than people. |
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joshuasuneel Associate
Joined: 21 Dec 2005 Posts: 2
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Posted: Wed Dec 21, 2005 11:17 am Post subject: |
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x+y = 12 and y>x
x and y are positive prime numbers.
12 = 5+7 or 1+11 or 2+10 or 3+9 or 4+8 or 6+6
out of these combinations, the only combination that fits is 5 and 7. |
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joshuasuneel Associate
Joined: 21 Dec 2005 Posts: 2
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Posted: Wed Dec 21, 2005 11:22 am Post subject: |
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x+y = 12 and y>x ( from statement 2 )
x and y are positive prime numbers.
12 = 5+7 or 1+11 or 2+10 or 3+9 or 4+8 or 6+6
out of these combinations, the only combination that fits is 5 and 7.
So the Answer is C. |
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shaji Senior Consultant
Joined: 25 Apr 2005 Posts: 34
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Posted: Wed Dec 21, 2005 12:45 pm Post subject: |
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Hi;
Answer is E , since y=11 & x=1 is a possibility .
Regards;
Shaji |
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ksb GMAT Tutor
Joined: 28 Dec 2004 Posts: 54 Location: Chennai, India
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Posted: Sat Jan 28, 2006 3:34 pm Post subject: 1 is neither prime nor composite |
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1 is neither prime nor composite
A prime number by definition has to have two factors or divisors.
1 has only one. So, it falls under neither category.
So, the answer should be C. |
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