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来源	题目内容
	Is ax = 3-bx?(1)x(a + b) = 3(2)a = b = 1.5 and x = 1
	If $$xy\neq0$$, is $$\frac x y=1$$?(1)$$x^2=y^2$$(2)$$xy >0$$
	If $${x}!={0}$$, is x equal to - 1?1. $${x}^{5}={x}$$2. $${x}{2}=-{x}$$
190124	r,s are positive numbers. Is r < s? 1：r+s < 1 2：$$r^{2}$$=2s
191222 还原机经选题: 数论&代数	Known that -1 and 3 are the two roots of f (x) = ax ^ 2-bx + c, Is f(1)>0？ (1)f(0)=2 (2)f(-3)>f(-4)
PREP07 Test 1	What is the remainder when the positive integer n is divided by 3?(1)The remainder when n is divided by 2 is 1.(2)The remainder when n + 1 is divided by 3 is 2.
第一期	What is the remainder when the positive integer n is divided by 3? (1) The remainder when n is divided by 2 is 1. (2) The remainder when n + 1 is divided by 3 is 2.
PREP07 Test 1	In the figure above, points P and Q lie on the circle with center O. What is the value of s ?
191020	A building has x floors. The top floor has only one room. The number of rooms per floor below is twice that of the floor above it. What is the number of rooms on the bottom floor?
OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022	if $$\frac{p}{q}$$<1, and p and q are positive integers, which of the following must be greater than 1 ?
190310	Is m>2? 1.$$\sqrt{m \sqrt{m \sqrt{2m}}} > 2$$ 1.$$\sqrt{2 \sqrt{2 \sqrt{2m}}} > 2$$
190124	$$\frac{4+\sqrt{28}}{\sqrt{9}+7}$$=?
Ready4	Lyle puts balls numbered 1 through 75 into a bag with 75 other balls of the same size but without numbers. Min puts balls numbered 1 through 75 into a different bag with 125 other balls of the same size but without numbers. If Lyle and Min each select a ball at random from their respective bags, what is the probability that the 2 balls selected will have numbers that are the same?
	If 01,what is the median of the values x,x,x²,1/x,x½ and x³?
PREP07 Test 1	If a and b are positive numbers, what are the coordinates of the midpoint of line segment CD in the xy-plane?(1) The coordinates of C are (a, 1 - b).(2) The coordinates of D are (1 - a, b).
Magoosh	Jack has 5 cats and 1 dog. If the dog's weight is 3 times the average (arithmetic mean) weight of the cats, then the dog's weight is what fraction of the total weight of all 6 animals?
Magoosh	If $$5^{x+y} = 125$$ and $$3^{x-3y} = \frac{1}{9}$$, then y =
Ready4	If $\frac{4 - 2 y}{2 + y} = y$ , what is the value of $y^{2} + 4 y + 4$ ?
排列组合	From a group of 3 boys and 3 girls, 4 children are to be randomly selected. What is the probability that equal numbers of boys and girls will be selected?
	Which of the following fractions is equal to decimal 0.1875?