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190302	EF is tangent to a circle. ∠EBA=？ 1：AC goes through the center of the circle. 2：∠BAC=55°
190302	There are four small circles tangent to each other. The small circles are all inscribed in a large circle, as shown in the figure. The radii of small circles are all r. What is the ratio of the side length of the square formed by the line connecting four small circle centers to the diameter of the large circle?
190302	($$\frac{1}{3^{2}-$$\frac{1}{3}$$$$\frac{1}{4}}$$($$\frac{1}{3^{2} }$$+$$\frac{1}{3}$$$$\frac{1}{4}$$}$$=
190302	△ABC is isosceles triangle. AB = 5, DE = 3. The height of triangle ABC is 3. h=?
190302	The first row of the cinema has 16 seats. Each row behind has two more seats than the previous one. There are 64 seats in the last row. How many seats are there in the cinema?
190302	How many solutions does the equation \|2x-3\|=x-5 have?
190302	$$t^{3}$$=3. $$t^{2}$$=?
190302	AB=10, ∠A=60°, ∠C=45°. BC=？
190302	The cinema was supposed to sell 10 adult tickets and 20 children's tickets. Tickets for adults and children were sold $25 and $10, respectively. A total of $300 tickets were not sold before the film started. 4 adult tickets were sold. How many children tickets were sold?
190302	The denominations are different while the thickness is the same. The total value of $10000 of $20 banknotes is 35feet10inches. What is the height of the total value of $6000000000 of $50 banknotes? (1feet=12inches)
190302	x+y=z. Is y > 0? 1:y=x+z 2:x=y+z
190302 还原机经选题	X(Y+1)=2016. 5X+2Y=? 1:Y(2+3X)=2020 2:X=Y
190302 还原机经选题: 数论&代数	What is the unit digit number of $$5^{5}$$+$$6^{5}$$+$$7^{5}$$+$$8^{5}$$?
190302	-x+y+z = -10, -x-y+z = -10, -x+y-z = -10. x+y+z =?
190302	Someone investigated 100 people, 30 of whom bought milk. How many people bought both milk and orange juice? 1: Forty people bought orange juice. 2: There were 50 people who only bought milk or orange juice.
190302	What is the range of {3,7,8,x,12,y}? 1: The average of {3,7,8,x,12,y} is 7.5. 2: 3
190302	x,y,z are positive integers. x+y+z=? 1:xyz=251 2:x-y-z=0
190302	△ABC and △CDE are equilateral triangles. The quadrilateral BCFE is square. ∠DGE=？
190302	a,b,c,d are positive integers. x,y are not integers. x=$$a\sqrt{b}$$,y=$$c\sqrt{d}$$. Is $$\sqrt{xy}$$ an integer? 1:$$\sqrt{ac}$$ is a positive integer. 2:$$\sqrt[8]{bd}$$ is a positive integer.
190302	The cylinder is placed obliquely on the horizontal table EF. There is a small amount of water in the cylinder, and the water surface is the plane AB. BC=3. BD=？ 1：∠ADE=60° 2：CD=3