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181215	Is $$\frac{x^{2}}{4}$$ > x? 1:\|x\| ≥ x 2:x < 0
181215	S = PRT/100. Where S is the income, P is the investment amount, R is the annual simple interest, and T is the investment period. When the principal is $y, what is the two-year return on investment? 1: When the principal is $1000, the profit of the one-year investment is $40. 2: y = 8000.
181215	AB is perpendicular to AC. What is the x-interception of line AC?
181215	f(x)=$$x^{n}$$-1. What`s the solution of f(x)=0? 1: n is odd. 2: n is the multiple of 3.
181215	What`s the median of the sequence $$\frac{1}{π}$$,$$\frac{1}{π}$$-1,$$\frac{1}{π}$$+1,$$\frac{1}{(π-2)^{2}}$$,$$\frac{1}{(π+2)^{2}}$$?
181215	The efficiency of the dam is equal to the ratio of water flow to power generation. When the water flow increases by 40%, the power generation increases by 25%. How much does the efficiency of the dam increase?
181215	A rope with uniform thickness of 10cm weighs 500g. How many kilograms does the rope with length of 2m weigh?
181215	x,y are integers. Is x-y odd? 1: 2x+3y is odd. 2: 3x+2y is even.
181215	$$3^{6x}$$=8100. $$3^{3x-1}$$=?
181215	Two classes play 10 games, and the scores of the two classes are shown in the table below. Is the average score of class A higher than that of class B? 1: The minimum scores of each classes are 0. 2: f=4.
181215	Belly leaved home at 8:30 in the morning and arrived at the company at 11:30. How far is it from home to the company? 1: He stopped twice on the way. 2: The average speed while driving was 70 km/h.
181215	A shopkeeper sells mixed nuts. Mixed nuts are a mixture of c and p, with an average price of $2.7 per pound. What is the ratio of c in mixed nuts? 1: The unit price of c is $3.6 per pound. 2: The unit price of p is $2 per pound.
181215	$$(\frac{1}{125})^{x}$$=$$625^{y}$$, $$\frac{x}{y}$$=?
181215	Is the quadrilateral ABCD square? 1：AB=BC=CD=DA 2：∠A+∠B=180°
181215	Which of the following options meet the condition that there is a common factor greater than 1 between each two numbers, and there is no common factor greater than 1 between the three numbers?
181215	Both and are positive integers. Is $$(a^{-1}+b^{-1})^{-1}$$ < $$(a^{-1}b^{-1})^{-1}$$? 1:a > b 2:b > $$\frac{1}{2}$$
181215	Someone walked to school. The average speed of her first 30 miles was x, and the average speed of her later 60 miles was y. What's the average speed of this person on this 90 miles road?
181215	$$ -1\leq x \leq 0.$$What`s the following option arranges the number set {$$x^{-1}$$,$$x^{-2}$$,1,x} in order of small to large?
181215	Line L goes through (r,s). Is r > s? 1: r > 0 2: The slope of is negative.
181215	The numbers in the set are all multiples of n, for example {-2n, -n, 0, n, 2n, 3n,....}. Can we determine the value of n when n > 0? 1: - 7 is in the set. 2: 49 is in the set.