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190302	The average speed of a train is 50 miles/h. How many seconds does it take for the train to finish a journey of 700 feet? (1 mile = 5280 inches)
190302 还原机经选题: 文字题&几何	N employees of a company raised money to buy a gift of X for a former colleague. But in the end, 10 employees quit. How much more must the remaining employees pay on average?
190302	x=$$\sqrt{3}$$+$$\sqrt{7}$$.x+$$\frac{1}{x}$$=?
190302	0.62576257- is a limited repeating decimal (6257 repeats). What is the number of the 987th digit?
190302	One shop sells two kinds of bowls. Each class a bowl costs $15. The price of each class B bowl is $18. Initially, there were 20 class A bowls and 18 class B bowls in this shop. A week later, the store's sales were $222. How many bowls are left in class A?
190302	$$a_1$$=2,$$a_2$$=$$a_1^{3}$$,$$a_3$$=$$a_2^{3}$$,...,$$a_n$$=$$a_{n-1}^{3}$$.$$a_99$$=?
190302	$$\frac{b}{a}$$ - $$\frac{a}{b}$$=0.Which of the following option must be true?
190302	$$x^{2}$$+$$y^{2}$$+$$z^{2}$$=16,xy+yz+xz=8,x,y,z > 0 .x+y+z=?
190302	\|xy\|+xy ≤ 0? 1:\|x\|+xy ≤ 0 2:\|y\|+xy ≤ 0
190302	$$\frac{a}{b}$$+$$\frac{b}{a}$$=2. Which of the following option must be true?
190302	AB//CD. ∠BAD=45°, ∠BCD=60°, BC=CD=6. AB=?
190302	16 < $$\frac{(n-1)!n!(n+1)!}{n!}$$ < 17. n is an positive integer. n=?
190302	As shown in the figure, the four points divided XY into three equal parts. What is the value of y in terms of x?
190302	What is the unit digit number of $$5^{5}$$+$$6^{6}$$+$$7^{7}$$+$$8^{8}$$?
190302	There are 50 balls in an opaque bag. The numbers of black balls, white balls, red balls and blue balls are 20, 20, 6, and 4, respectively. If two balls are randomly taken out, what is the probability that the two balls have the same color?
190302	The remainder is 15 when 75 is divided by x, and the remainder is 8 when 48 is divided by x. What is the range of x?
190302	The distance from an asteroid to earth is 3.8$$10^{5}$$m. The distance between the moon and the earth is 4$$10^{2}$$m. The distance from the asteroid on a map to the earth is 1.9cm. What is the distance from the moon to the earth on the map?
190302 还原机经选题: 数论&代数	$$d_1$$=$$\sqrt{6^{2}+8^{2}}$$ ,$$d_2$$=$$\sqrt{8^{2}+(6+4\frac{3}{4})^{2}}$$.Which range does $$d_2$$ - $$d_1$$ fall in?
190302	x=? 1: The greatest common divisor of x and 12250 is 350. 2: The least common multiple of x and 12250 is 24500.
190302	y=-\|a-x\|+b. What is the area of the graph of this function above the x axis? 1:b=4 2:ab=8