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190124
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$$(\sqrt{\sqrt{2}}$$+$$\sqrt{\sqrt{8}})^{2}$$ = ?
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190113
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If n is odd, f(n)=$$2^{n}$$. If n is even, f(n)=$$3^{n}$$. What is the value of f(n) when n=$$2^{10}$$?
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190207
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E is a point on the CD of a parallelogram ABCD, the area of which is three times that of the triangle ACE. What is the value of CE/CD=?
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190415
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S is the total volume of 16 balls whose diameters are 1. C is the volume of 16 cylinders with a diameter of 1 and a height of 1.$$\frac{s}{c}$$=?
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OG18-定量推理
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 On the number line, the shaded interval is the graph of which of the following inequalities?
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In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old. If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?
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In a large investment firm, 25 percent of the male employees and 30 percent of the female employees are stockbrokers. If 60 percent of the firm’s employees are males, what is the ratio of the number of male stockbrokers to the number of female stockbrokers?
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Of the following, which is the closest approximation of $$\frac{0.52\times0.49}{1.998}$$
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$$\sqrt{{2\sqrt{63}}+{\frac2 {8+3\sqrt7}}}$$
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The operation $$O$$ is defined by the equation $$x O y$$ = $$\frac{x-y} {x+y}$$, where $${y}!=-{x}$$. If $$3 O y = 5 O 4$$, then y =
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PREP07 Test 1
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 If m lies between the integers p and s on the number line shown, which of the following is a possible value for m?
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Magoosh
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If $$5^{x+y} = 125$$ and $$3^{x-3y} = \frac{1}{9}$$, then y =
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Magoosh
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If x and y are both positive and $$\sqrt{x^{2}+y^{2}} = 3x - y, then \frac{x}{y} =$$
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Magoosh
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k is a positive number. If k is twice its reciprocal, and j is twice k, then jk =
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Magoosh
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If the sum of two numbers is 6, and the sum of their reciprocals is $$\frac{15}{8}$$, what is the product of the two numbers?
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Magoosh
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A: {71,73,79,83,87} B:{57,59,61,67}If one number is selected at random from set A, and one number is selected at random from set B, what is the probability that both numbers are prime?
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Magoosh
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$${1}\over{1+{{1}\over1-\frac{1}{3}}}$$
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Magoosh
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$$({0.1666666…})\over({0.375})(0.4444444…)^{2}$$=
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Magoosh
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What is the Greatest Common Factor (GCF) of$$ 25x^{2} and 16y^{4}$$?
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Magoosh
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A box contains 6 black balls and 4 white balls. If two balls are selected at random without replacement, what is the probability that both balls are white?
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