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OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022	Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 percent fescue. If a mixture of X and Y contains 30 percent ryegrass, what percent of the weight of the mixture is X ?
	Which of the following is NOT equal to the square of an integer?
	$$({\sqrt{{7}+\sqrt{48}}+\sqrt{{7}-\sqrt{48}}})^{2}$$
OG16 OG17 OG18 OG19 OG20 OG2022	If 2x + y = 7 and x + 2y = 5, then $$\frac{x+y}{3}=$$
OG12 OG15	What is the lowest positive integer that is divisible by each of the integers 1 through 7,inclusive
Ready4	How many distinct prime numbers between 1 and 30 are factors of 3,366?
第一期	If$$x = \sqrt{3} +\sqrt{7}$$ , what is the value of $$x+\frac{1}{x}$$ ?
	On January 1, 1994, Jill invested P dollars in an account that pays interest at a rate of 8 percent per year, compounded annually on December 31. If there were no other deposits or withdrawals in the account, how many dollars were in the account on January 1, 1998, in terms of P?
	The percent increase in the total number of Internet users from 2002 to 2007 was approximately %.The number of Internet users per 100 people increased by approximately from 2000 to 2010.
	The graph suggests that Nation X most likely experienced a food shortage shortly before the year For the year that the total dietary intake of carbohydrates was lowest, the per-person intake of carbohydrates was approximately times the per-person intake of dietary fiber.
OG18-数学分册	On a certain transatlantic crossing, 20 percent of a ship`s passengers held round-trip tickets and also took their cars aboard the ship. If 60 percent of the passengers with round-trip tickets did not take their cars aboard the ship, what percent of the ship`s passengers held round-trip tickets?
OG12 OG15 OG16	If 1 kilometer is approximately 0.60 mile, which of the following best approximates the number of kilometers in 2 miles?
	$$\frac{2}{\frac{3}{4}}=$$
190321	The surface area of cube A is K times of that of cube B. What is ratio of the volume of cube A to that of cube B?
Magoosh	If K is the least positive integer that is divisible by every integer from 1 to 8 inclusive, then K =
Magoosh	If \|x + 5\| = 3 and $${{\|2y - 1\|}\over{3}} = 5$$, then \|x + y\| could equal each of the following EXCEPT
OG19-语文分册 OG20-语文分册	The passage suggests that the historians referred to in line 1 make which of the following assumptions about Renaissance Europe?
OG15 OG16 OG17 OG18	If $$\mid{y}-\frac{1}{2}\mid<\frac{11}{2}$$ which of the following could be a value of y?
	What is the 18th digit to the right of the decimal point in the decimal expansion of$$\frac{1}{37}$$ ?
Ready4	Buildings $X$ , $Y$ , and $Z$ are a total of $195$ meters tall. If building $X$ is $<font color='#FE8080'>1</font>\frac{<font color='#FE8080'>1</font>}{3}$ times as tall as building $Y$ and $\frac{2}{3}$ times as tall as building $Z$ , what is the combined height, in meters, of buildings $Y$ and $Z$ ?