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190113	If x, y, and z are positive integers, x+y+z=? (1)xyz=154 (2)x-y-z=2
190113	If x, and y are positive even integers, what is the lower limit of the maximum factor of 2$$x^{2}$$+4$$y^{2}$$?
190113	Two workers worked together. It took the worker A six hours to finish 5000 pieces. It took the worker B two hours to finish the same workload. If A and B start to work simultaneously, and stop at the same time, how much does the output of the worker A account for the total output of A and B?
190113	Tom charged tenants $16400 for two departments A and B last year. The rent of each department was charged monthly, and the monthly rent of these two departments was constant last year. The monthly rent of department A was $100 higher than that of department B. Department B was rented all year round, and department A was rented for 10 months. How much was department B rent per month?
190113	$$(9+\frac{1}{9})^{2}$$-$$(9-\frac{1}{9})^{2}$$=?
190113	Is the positive integer p the sum of the square of two integers? (1) p is prime. (2) p=4y+1. y is an integer and 0 < y < 5.
190113 还原机经选题: 文字题&几何	A total of 100 people participated in a survey. Thirty people bought milk. How many people bought both milk and orange juice? (1) 40 people bought orange juice. (2) There were 50 people who bought exactly one of these two drinks.
190113	There is a rectangle. The length of this rectangle is L, and the width is W. This rectangle has the same area as a square. What's the difference between the circumference of a rectangle and that of a square? (1) $$\sqrt{L}$$ - $$\sqrt{W}$$ = $$\sqrt{2}$$ (2)$$\sqrt{L}$$ + $$\sqrt{W}$$ = $$3\sqrt{2}$$
190113	The sequence $$a_1$$,$$a_2$$,......$$a_n$$ , such that $$a_3$$=$$a_1$$+$$a_2$$,$$a_4$$=$$a_1$$+$$a_2$$+$$a_3$$,$$a_n$$=$$a_1$$+$$a_2$$+......+$$a_{n-1}$$.If $$a_n$$=p,what is the value of $$a_{n+2}$$.when n is greater than 2?
190113	Is the average of r, s, and t equal to their median? (1) The average of r, s, and t is s. (2) r < s < t
190113	Is x a negative number? (1) $$x^{3}$$ < $$x^{2}$$ (2) $$x^{3}$$ < $$x^{4}$$
190113	The cost of a commodity is $12.50, and the wholesale price is $17. The retail price is 50% higher than the wholesale price. How much is the retail price higher than the cost price?
190113	How many positive factors does 225 have?
190113	What`s the circumference of the circle whose area is $$\frac{9π}{4}$$ ?
190113	$$[3(x)^{-1}+3(y)^{-1}]{-1}$$=?
190113	A car passes through three points A, B and C on a road, successively. The average speed of a driver driving through AC was 20 feet/second. What's the average speed he drove through section BC? (1)The average speed he drives through section AB was 10 feet/second. (2)It took him 20 seconds to drive through section BC.
190113	If x+y=u, and x-y=v, xy=?
190113	According to the number axis in this picture, \|y-x\|=2\|z-y\|, and \|y\|=2/7\|x\|. If y= -2, z=?
190113	If is a positive integer, and 16 < $$\frac{(n-1)!n!(n+1)!}{n!}$$ < 17,n=?
190113	An opaque bag contains 50 balls in only two colors, red and white. Remove 2 balls from the bag one by one without replacement. What is the total number of white balls in the bag? (1)The probability of taking out the white ball for the first time is $$\frac{1}{5}$$. (2)The probability that the ball taken out are both red is $$\frac{156}{245}$$.