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191020	What is the number of factors of positive integer x? (1)18 is the second largest factor of x (2)$$x = 6^n$$
191020	The salary of Tom consists of base salary and commission. Base salary = The work time*8.5dollars/hour, and commission is 2% of the part which exceeds the amount of sales C. What is the value of C? (1)If Tom works 25 hours, he will get 250 dollars (2)If Tom works 28 hours, he will get 280 dollars
190302	The sum of x, y, and z is even. Can xyz be divided by 4? 1: x=y=z 2: x,y,z are even.
190302	The length, width and height of cuboid are w, m and h respectively. The cuboid is filled with a little water. When wm is the bottom, the height of water is x (x < h). When mh is the bottom, the height of water is y (y < w). $$\frac{x}{y}$$=? 1：x=3 2：$$\frac{w}{h}$$=7
190302	Is $$x^{2}$$+9x+y even? 1：x=10 2：y=15
190302	How many solutions does the quadratic equation 2$$x^{2}$$+3x+c=0 have? 1：△ > 0 2：c > 0
	In a class of 21 students, how many scored above the class average (arithmetic mean) on the final exam? (1) The class average is 78 (2) The class median is 78.
	从A市到C市途径B市有上下车, 到C市的时候剩$$\frac{1}{4}$$(狗主编造)的人, 问A市上车的有多少人？1 B市下车比上车多2人2 B市下的人占总数的$$\frac{1}{4}$$
Ready4	It would take one landscaper 45 minutes to mow a lawn and another landscaper 60 minutes to mow the same lawn. How many minutes would it take both landscapers, working simultaneously at their respective constant rates, to mow the lawn?
Ready4	If lines $g$ and $h$ are perpendicular to each other, is the slope of line $g$ negative? (1) line $h$ passes through the point $(-3,-3)$ (2) the slopes of lines $g$ and $h$ are negative reciprocals of each other
Ready4	Is the triangle above a right triangle? (1) In an $xy$ -plane, $L$ and $N$ have the same $y$ -coordinates. (2) In an $xy$ -plane, $M$ has coordinates $(-1,6)$ .
Ready4	Is the triangle above a right triangle? (1) In an $xy$ -plane, $R$ and $S$ have the same $y$ -coordinates. (2) In an $xy$ -plane, $S$ and $T$ do not have the same $x$ -coordinates.
OG17 OG18 OG19 OG20 OG2022	On the number line, point R has coordinate r and point T has coordinate t. Is $$t<0$$?(1) $$-1<{r}<0$$(2) The distance between R and T is equal to $${r}^{2}$$.
	If an automobile averaged 22.5 miles per gallon of gasoline, approximately how many kilometers per liter of gasoline did the automobile average? (1 mile = 1.6 kilometers and 1 gallon = 3.8 liters, both rounded to the nearest tenth.)
Ready4	Sequence $X$ is defined as $X_1=2$ , $X_2=-2$ , and for all $n \geq 2$ : $X_{n+<font color='#FE8080'>1</font>}=X_n+2(X_{n-<font color='#FE8080'>1</font>})$ What is the value of $X_{10}$ ?
Ready4	If $1 - \frac{1}{y} = \frac{y}{4}$ , then y has how many possible values?
	The sum, s, of consecutive integers from 1 to n is given by the formula $${s}={n}\frac{(n+1)}{2}$$. What is the value of the sum if it is three times as large as the number of integers summed?
190207	n is a positive integer. The reminder of n divided by 5 is equal to that of divided by 5 ,what is the value of n. 1: The reminder is 1. 2: n can divided by 6.
OG12 OG15	In the figure above, the point on segment PQ that is twice as far from P as from Q is
	An intercollegiate basketball tournament is hosting playoffs with 320 players. Each team has 5 players and each team plays exactly one other team and either wins or loses. The winning team advances to the next round and the losing team is eliminated. No team or player drops out except by losing a game. From the available options, select a number of tournament rounds and a number of teams such that after the specified number of rounds there will be a specified number of teams remaining in the tournament. Make only two selections, one in each column.