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191222	A and B are two different kinds of pipes. The radius of A is 1.5 times the radius of B. The rate of water injection of both pipes is proportional to the area of the circle of the injection hole of the pipe. How many hours will it take for pipe B to fill the empty container with water? Condition 1: pipe A needs 14 hours to fill the empty container with water Condition 2: rate ratio A:B=3:2
191222	\|2-\|2-x\|\|=2,How many solutions do X have?
191222	$$K=1+2+2^2+2^3+....+2^n$$,n=9, what is the value of K?
191222 还原机经选题	A two-digit number can be formed by the integers in set {1, 5, 7, x, y}. The five integers could form 20 two-digit numbers without any digit repeated. We find that the sum of all the 20 numbers is 1056=44*24, then what is the value of x+y?
191222	Given that the line AB is tangent with cicle ⊙O at point B, the radius r of ⊙O is 2. What is the area of the shaded area ? 1：OB=AC 2：BC=OB
191222	There is a set of numbers, in which $$a_0=0$$,$$a_1=1$$,$$a_2=1$$,....,$$a_n=a_{n-1}+a_{n-2}$$,What is the value of $$a_5$$.
191222 还原机经选题	Is x an integer? 1: 5x is an integer 2: The reciprocal of x is an integer
191222	There is a square living room next to a rectangular bath room whose area is 121m^2. The length of the bath room is 3m longer than the side of the living room, and the width is 3m shorter than the side of the living room. What is the area of such living room?
191222	A rectangular table is 60 in length and 16 in width. The tablecloth covers the table. The edge of the tablecloth is 2 away from each side of the table. What is the area of the tablecloth not on the table?
191222	There is a dug on a surface, a frog at 4foot below the dug, and then another frog is 3.5foot from dug and 3.5 foot from the first frog. How far is this frog under the surface?
191222	There is a six-digit integer: 495372. If two numbers are exchanged with each other, is the new number n larger than 495372? (1)3 is a factor of n (2)4 is a factor of n
191222	Is x>0 ? 1:2^\|x\|=2^x 2:3^\|x\|≥3^x
191222	There is a number E, which is a four-digit number, and each digit is an even number; One number is O, which is also a four-digit number, but every digit is odd. There is currently a number W=E+O, and W is a number with five digits, so how many of the five digits of W can't be odd?
191222	As shown in the figure, a circle is inscribed in a square, what's the ratio of the shaded area to the triangle PQR?（π≈3.14）
191222 730高分节-数学测试	A, b, and c are three positive integers. a≤b≤c, can 2a+2b+2c be divided by 10? Condition 1: c=a+1 Condition 2: b=c
191222	As shown in the figure, the circle has radius r, which is the inscribed circle of an equilateral triangle. What is the length of the side of the equilateral triangle？（represented by r）
191222	P(X)=ax²+bx+c,a≠0,P(-1)=0,P(3)=0. Is P(5)>0? Condition 1: P(0)=3 Condition 2: P(-4)-P(-3)<0
191222 730高分节-数学测试	$$x_1$$, $$x_2$$, -, $$x_n$$,$$x_1$$=3,$$x_n=2 x_{n-1}-1$$,问$$x_{20}-x_{19} = $$
191222	One person works 12 yuan an hour, 35 hours at most, if she works more than 35 hours, the hourly wage will increase by 50%. She said that if she works 4 hours more this month, she will get 60 yuan more. How many hours did she work this month?
191222	A second-hand book seller will pay 35% of the list price, and the list price is 60% of another price A. What percent of the price A is the book seller`s pay?