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OG19-数学分册
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In the coordinate plane, line k passes through the origin and has slope 2. If points (3,y) and (x,4) are on line k, then $$x + y$$ =
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181215
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A={1,2,3,4,5}, B={1,2,3,4,5}. Take a number from sets A and B respectively. What is the probability that the product of these two numbers is less than 4?
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190124 还原机经选题: 文字题&几何
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Two numbers will be chosen from the sequence {1,2,3,5,6,10} and {1,2,3,5,7}, one from each sequence. What's the probability that the product of the two numbers is not 4?
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Magoosh
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What is the value of $${1}\over{x + 4}?$$Statement #1: 4.375x – 6.25 = 11.25Statement #2:$${{1}\over{x+8}}-\frac{1}{48}=\frac{1}{16}$$
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Magoosh
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Is $$x^2-\frac{4}{3}x+\frac{5}{12}\lt0$$Statement #1:$$ 0 \le x$$Statement #2: x is an integer
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OG18-数学分册
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If $$4 < \frac{7 - x}{3}$$, which of the following must be true?I. 5 < xII. |x + 3| >2III. - (x + 5 ) is positive.
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OG19-数学分册
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If 4 < $$\frac{7-x}{3}$$, which of the following must be true?
I. 5 < x
II. | x + 3| > 2
Ill. -(x + 5) is positive.
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Ready4
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For two positive integers  and  , is  divisible by  ?
(1) 
(2) and are both odd
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Magoosh
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Consider the three points in the x-y plane: P = (8, 4), Q = (6, 7), and R = (9, 0). Rank these three points from closest to the origin, (0, 0), to furthest from the origin.
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Ready4
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Six distinct pairs of shoes are in a closet. If three shoes are selected at random from the closet, what is the probability that no two of the chosen shoes make a pair?
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Ready4
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What is the value of  ?
(1) 
(2) 
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Ready4
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Is  to the right of  on the number line?
(1) is between  and  .
(2) is less than  .
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Magoosh
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A box contains 4 red chips and 2 blue chips. If two chips are selected at random without replacement, what is the probability that the chips are different colors?
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200301
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x and y are both greater than 0，what is the value of √x-√y？
(1). √x-√y=2*4√xy
(2). x^2-y^2=2xy
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OG18-数学分册
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If N is a positive odd integer, is N prime?(1) $$N = 2^{k} + 1$$ for some positive integer k.(2) N + 2 and N + 4 are both prime.
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OG19-数学分册
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If N is a positive odd integer, is N prime?
(1) $$N = 2^{k} + 1$$ for some positive integer k.
(2) $$N + 2$$ and $$N + 4$$ are both prime.
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PREP07 Test 2
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What is the median of a certain set of 7 numbers? (1) 3 of the numbers are less than 10. (2) 4 of the numbers are greater than 10.
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PREP07 Test 1
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Is r to the right of -6 on the number line?(1) r is between -4 and -1 on the number line.(2) r is between -3 and 1 on the number line.
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PREP07 Test 2
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In the xy-plane, point P has coordinates (a, b) and point Q has coordinates (c, d). What is the distance between P and Q ?(1) b - d = 4(2) a - c = 3
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181215
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S = {1,2,3,4,5}, A,B are subsets of S, Ac, Bc represent the sets belonging to S but not belonging to A,B respectively. Ac∩B=？
1: A∩B={2}
2: A∩Bc={4}
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