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GMATH practice exercise (Quant Class 20) The straight lines given by the equation 2(x^2)=2(y^2)-3xy are: (A) parallel (B) intersecting and they form a 30-degrees angle (C) intersecting and they form a 45-degrees angle (D) intersecting and they form a 60-degrees angle (E) intersecting and they form ...
- by fskilnik@GMATH
Thu Mar 21, 2019 1:33 pm- Forum: Problem Solving
- Topic: The straight lines given by the equation 2x^2=2y^2-3xy are:
- Replies: 1
- Views: 502
If (r+1/r)^2 = 5, what is the value of (r^3+1/r^3)^2?
GMATH practice exercise (Quant Class 3) If (r+1/r)^2 = 5, what is the value of (r^3+1/r^3)^2? (A) 7.75 (B) 10 (C) 12.25 (D) 15 (E) 20 $${\left( {r + {1 \over r}} \right)^2} = 5\,\,\,\,\,\left( * \right)$$ $$? = {\left( {{r^3} + {1 \over {{r^3}}}} \right)^2}$$ $$?\,\,\, = \,\,\,{\left[ {\left( {r + ...
- by fskilnik@GMATH
Thu Mar 21, 2019 1:10 pm- Forum: Problem Solving
- Topic: If (r+1/r)^2 = 5, what is the value of (r^3+1/r^3)^2?
- Replies: 2
- Views: 588
A dessert recipe calls for 50% melted chocolate and 50% raspberry puree to make a particular sauce. A chef accidentally makes 15 cups of the sauce with 40% melted chocolate and 60% raspberry puree instead. How many cups of the sauce does he need to remove and replace with pure melted chocolate to m...
- by fskilnik@GMATH
Thu Mar 21, 2019 12:46 pm- Forum: Problem Solving
- Topic: A dessert recipe calls for 50% melted chocolate and 50%
- Replies: 2
- Views: 625
The straight lines given by the equation 2x^2=2y^2-3xy are:
GMATH practice exercise (Quant Class 20) The straight lines given by the equation 2(x^2)=2(y^2)-3xy are: (A) parallel (B) intersecting and they form a 30-degrees angle (C) intersecting and they form a 45-degrees angle (D) intersecting and they form a 60-degrees angle (E) intersecting and they form ...
- by fskilnik@GMATH
Thu Mar 21, 2019 12:08 pm- Forum: Problem Solving
- Topic: The straight lines given by the equation 2x^2=2y^2-3xy are:
- Replies: 1
- Views: 502
If (r+1/r)^2 = 5, what is the value of (r^3+1/r^3)^2?
GMATH practice exercise (Quant Class 3)
If (r+1/r)^2 = 5, what is the value of (r^3+1/r^3)^2?
(A) 7.75
(B) 10
(C) 12.25
(D) 15
(E) 20
Answer: [spoiler]_____(E)__[/spoiler]
- by fskilnik@GMATH
Thu Mar 21, 2019 11:43 am- Forum: Problem Solving
- Topic: If (r+1/r)^2 = 5, what is the value of (r^3+1/r^3)^2?
- Replies: 2
- Views: 588
[GMAT math practice question] xy=? 1) (x-2)^2 = -|y-3| 2) |x-2| +√( y-3) =0 $$? = xy$$ $$\left( 1 \right)\,\,\,{\left( {x - 2} \right)^2} = - \left| {y - 3} \right|\,\,\,\,\,\left( * \right)$$ $$\left. \matrix{ {\left( {x - 2} \right)^2} \ge 0 \hfill \cr - \left| {y - 3} \right| \le 0\,\, \hfill ...
- by fskilnik@GMATH
Wed Mar 20, 2019 7:39 am- Forum: Data Sufficiency
- Topic: xy=?
- Replies: 2
- Views: 496
[GMAT math practice question] Jeonghee has 5 different red cards and 5 different blue cards. She shuffles the10 cards, and then places 5 of the cards in a row. What is the probability that all red cards are adjacent to each other and all blue cards are adjacent to each other in her row? A. 2/5 B. 2...
- by fskilnik@GMATH
Wed Mar 20, 2019 7:21 am- Forum: Problem Solving
- Topic: Jeonghee has 5 different red cards and 5 different blue card
- Replies: 2
- Views: 551
GMATH practice exercise (Quant Class 12) https://i.postimg.cc/cJzYVGNC/17-Mar19-3g.gif $${2^{2.322}} \cong 5\,\,\,\, \Rightarrow \,\,\,\,\,{\left( {{2^{2.322}}} \right)^{0.5}} = {5^{0.5}}\left( * \right)$$ $${{{2^{ - 5}} \cdot \root 3 \of {{{10}^2}} } \over {\root 6 \of {10} \cdot {2^x}}} = 1\,\,\,...
- by fskilnik@GMATH
Sun Mar 17, 2019 4:46 pm- Forum: Problem Solving
- Topic: If 5 is approximately equal to 2^(2.322), which of the follo
- Replies: 1
- Views: 632
GMATH practice exercise (Quant Class 17) There are many boxes in a certain room, and each box has a label attached to it in which the number of balls contained in that box is written. If there are exactly 612 balls in all boxes combined, and it is known that the numbers presented at the labels form...
- by fskilnik@GMATH
Sun Mar 17, 2019 4:40 pm- Forum: Problem Solving
- Topic: There are many boxes in a certain room, and each box has a l
- Replies: 1
- Views: 563
GMATH practice exercise (Quant Class 16) If A>B are two odd numbers, how many even numbers are there between them? (A) (A+B)/2 (B) A-B+1 (C) A-B (D) A-B-1 (E) (A-B)/2 $$?\,\, = \,\,\# \,\,{\rm{even}}\,\,{\rm{numbers}}\,\,{\rm{in}}\,\,\left[ {B,A} \right]\,\,\,\,\,\,\left( {B < A\,,\,\,{\rm{odds}}} ...
- by fskilnik@GMATH
Sun Mar 17, 2019 4:35 pm- Forum: Problem Solving
- Topic: If A>B are two odd numbers, how many even numbers are the
- Replies: 2
- Views: 612
GMATH practice exercise (Quant Class 16) If A>B are two odd numbers, how many even numbers are there between them? (A) (A+B)/2 (B) A-B+1 (C) A-B (D) A-B-1 (E) (A-B)/2 $$?\,\, = \,\,\# \,\,{\rm{even}}\,\,{\rm{numbers}}\,\,{\rm{in}}\,\,\left[ {B,A} \right]\,\,\,\,\,\,\left( {B < A\,,\,\,{\rm{odds}}} ...
- by fskilnik@GMATH
Sun Mar 17, 2019 4:33 pm- Forum: Problem Solving
- Topic: If A>B are two odd numbers, how many even numbers are the
- Replies: 2
- Views: 612
GMATH practice exercise (Quant Class 3) https://i.postimg.cc/SsDKwW9r/17-Mar19-6y.gif $${x^2} \cdot f\left( x \right) = {2^{8 - x}}\,\,\,\,\left( * \right)$$ $$? = 100 \cdot f\left( 5 \right)$$ $$x = 5\,\,\,\,\,\mathop \Rightarrow \limits^{\left( * \right)} \,\,\,\,\,25 \cdot f\left( 5 \right) = {2...
- by fskilnik@GMATH
Sun Mar 17, 2019 4:23 pm- Forum: Problem Solving
- Topic: If f is a function defined for every positive integer x in s
- Replies: 1
- Views: 546
There are many boxes in a certain room, and each box has a l
GMATH practice exercise (Quant Class 17) There are many boxes in a certain room, and each box has a label attached to it in which the number of balls contained in that box is written. If there are exactly 612 balls in all boxes combined, and it is known that the numbers presented at the labels form...
- by fskilnik@GMATH
Sun Mar 17, 2019 1:06 pm- Forum: Problem Solving
- Topic: There are many boxes in a certain room, and each box has a l
- Replies: 1
- Views: 563
If A>B are two odd numbers, how many even numbers are the
GMATH practice exercise (Quant Class 16)
If A>B are two odd numbers, how many even numbers are there between them?
(A) (A+B)/2
(B) A-B+1
(C) A-B
(D) A-B-1
(E) (A-B)/2
Answer: [spoiler]_____(E)__[/spoiler]
- by fskilnik@GMATH
Sun Mar 17, 2019 12:29 pm- Forum: Problem Solving
- Topic: If A>B are two odd numbers, how many even numbers are the
- Replies: 2
- Views: 612
If f is a function defined for every positive integer x in s
GMATH practice exercise (Quant Class 3)
Answer: [spoiler]_____(C)__[/spoiler]
- by fskilnik@GMATH
Sun Mar 17, 2019 11:20 am- Forum: Problem Solving
- Topic: If f is a function defined for every positive integer x in s
- Replies: 1
- Views: 546