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来源	题目内容
200301	If x is p% higher than y and y is r% lower than z, what's the value of x in terms of p and r?
OG16 OG17 OG18 OG19 OG20 OG2022	The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals the average (arithmetic mean) of the coordinates of the points R, S, and T ?
190321	After someone deposited r dollars in his account, the balance was t dollars. Then, he spent a third of his balance on purchases. How much was the balance of his account after consumption?
OG17 OG18 OG19 OG20 OG2022	A total of s oranges are to be packaged in boxes that will hold r oranges each, with no oranges left over. When n of these boxes have been completely filled, what is the number ofboxes that remain to be filled?
PREP07 Test 1	In the rectangular coordinate system above, for which of the shaded regions is the area 2 ?
181215	The big circle is concentric with the small circle whose radius is r. An equilateral triangle is inscribed on the big circle and circumscribed on the small circle. What is the area of the shadow?
Magoosh	This year, a woman has a lucrative one-year position. During this year, she will give a fraction f of her salary to her husband, a private investor, to invest and they will live this year on the remainder. Through investments, her husband can turn each dollar she gives him into 1 + r, which will be deposited in a bank account. Their goal is to save & invest enough money so they can live off this money for two years following the end of the wife's position. Toward this end, they want to choose f such that the amount in the account at the end of the year is twice what they lived off this year. In terms of r, what should f be?
Ready4	Trail mix R contains 10% nuts, trail mix S contains 20% nuts, and trail mix T contains 18% nuts. If $<font color='#FE8080'>r</font>$ grams of trail mix R, $s$ grams of trail mix S, and $t$ grams of trail mix T are combined to give $<font color='#FE8080'>r</font>+s+t$ grams of trail mix that contain 15% nuts, what is $s$ in terms of $<font color='#FE8080'>r</font>$ and $t$ ?
Ready4	If $n-rs=n$ and $<font color='#FE8080'>r</font>\ne 0$ , which of the following must be true?
190215	The range of 9 consecutive positive integers is r. The standard deviation is d, and the average value is m. Which of the following options correctly determines the relationship among r, d, and m?
Ready4	How quickly heat transfers through an insulating layer depends on that insulator's thermal resistance. If two insulators are used together, the inverse of the combined thermal resistance is the sum of the reciprocals of each layer's thermal resistance. If the thermal resistances of two insulators are $<font color='#FE8080'>r</font>$ and $2r$ , what is their combined resistance?
Ready4	If $p, q,$ $<font color='#FE8080'>r</font>$ are positive integers such that $p$ is a divisor of $q$ , and $<font color='#FE8080'>r</font>$ is a multiple of $p$ , which of the following is NOT necessarily an integer?
OG18-数学分册	If x – y = R and xy = S, then (x – 2)(y + 2) =
OG19-数学分册	If $$ x - y = R$$ and $$ xy = S$$ , then $$ (x - 2)(y + 2)$$ =
OG12	This year Henry will save a certain amount of his income, and he will spend the rest. Next year Henry will have no income, but for each dollar that he saves this year, he will have 1 + r dollars available to spend. In terms of r, what fraction of his income should Henry save this year so that next year the amount he has available to spend will be equal to half the amount that he spends this year?
Ready4	Fruit Punch P contains 40% juice, Fruit Punch Q contains 30% juice, and Fruit Punch R contains 55% juice. If $p$ gallons of Punch P, $q$ gallons of Punch Q, and $<font color='#FE8080'>r</font>$ gallons of Punch R are mixed to give $p+q+<font color='#FE8080'>r</font>$ gallons of fruit punch that contain 45% juice, what is $p$ in terms of $q$ and $<font color='#FE8080'>r</font>$ ?
Ready4	If $\tfrac{<font color='#FE8080'>r</font>}{s}>1$ , and $<font color='#FE8080'>r</font>$ and $s$ are positive integers, which of the following must be less than 1?
Ready4	If it takes 65 minutes to drive s miles, how many minutes will it take to drive r miles at the same rate?
OG21 OG2022	m⊕p = n n⊕r =m n⊕q = q p⊕q = p q⊕p = r If the relations shown hold for the operation ⊕ and the numbers m, n, p, q, and r, then [(m ⊕ p) ⊕q] ⊕ p =
Ready4	A box contains b blue balls and r red balls. If 4 blue balls and 3 red balls are added to the box, and if one ball is obtained at random from the box, then the probability that a blue ball is obtained can be represented by