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PS
Which of the following equations is true for all positive values of x and y?
1. Root x + Root y = Root x+y
2. Root x^4y^16 = x^2y^4
3.(x Root y)(y Root x)= x^2y^2
4. yRootx+ y root x = Root 4xy^2
5. (x^y)(y^y)= (xy)^2y
OA 4
Experts Can you please suggest the best way to do this?
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Mon Jul 25, 2011 10:38 pm- Forum: Problem Solving
- Topic: PS
- Replies: 5
- Views: 1123
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Wed Jul 20, 2011 11:57 am- Forum: Problem Solving
- Topic: PS
- Replies: 3
- Views: 1034
PS
Points X, Y, and Z lie on circle C, and line segment XY passes through the center of the circle. If the area of circle C is 18pi, what is the greatest possible perimeter of triangle XYZ?
(A)18
(B)3r2 + 18
(C)6r2 + 6
(D)6r2 + 12
(E)9r2
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Wed Jul 20, 2011 11:16 am- Forum: Problem Solving
- Topic: PS
- Replies: 3
- Views: 1034
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Tue Jul 19, 2011 11:11 am- Forum: Sentence Correction
- Topic: Tough one!
- Replies: 13
- Views: 2363
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Mon Jul 11, 2011 11:18 am- Forum: Sentence Correction
- Topic: SC Problem Set
- Replies: 0
- Views: 896
Fractions.
Alice has x stamps and Thomas has y stamps, where x and y are positive integers. The ratio of x to y is 7 to 3. If Alice gives Thomas z stamps, where z is a positive integer and z < x, and no other changes take place in the numbers of stamps that Alice and Thomas have, then the ratio of the number o...
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Wed Jul 06, 2011 7:07 am- Forum: Problem Solving
- Topic: Fractions.
- Replies: 1
- Views: 1349
Probability
If x is a randomly chosen integer between 1 and 20, inclusive, and y is a randomly chosen integer between 21 and 40, inclusive, what is the probability that xy is a multiple of 4?
(A) 1/4
(B) 1/3
(C) 3/8
(D) 7/16
(E) 1/2
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Thu Jun 30, 2011 3:47 am- Forum: Problem Solving
- Topic: Probability
- Replies: 4
- Views: 1616
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Sat Jun 25, 2011 12:24 pm- Forum: Problem Solving
- Topic: PS
- Replies: 2
- Views: 1105
PS
If y is an integer greater than 2, all of the following must be divisible by 4 EXCEPT
(A) 2y(y+1)(y-1)
(B) y(2y+2)(y-3)
(C) y(y+3)(2y - 4)
(D) 2y(y+4)(y - 2)
(E) (y + 1)(2y + 4)(y - 3)
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Sat Jun 25, 2011 11:48 am- Forum: Problem Solving
- Topic: PS
- Replies: 2
- Views: 1105