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If {(12 + (a - 3)^{2})}^{\frac{<font color='#FE8080'>1</font>}{2}} = 4, what is the value of a?
If $$({2}-\sqrt{5}){x}=-{1}$$, then x =
190113 $$\frac{1}{2+\sqrt{3}}$$=?
Manhattan If X is the average of Y numbers, what is Y? (1) X = 54.5 (2) The sum of the Y numbers for which X is the average is 2,616.
Does the integer k have a factor p such that 1 < p < k?(1)k>4!(2)$$13! + 2 \le k \le 13! + 13$$
OG12 OG15 OG16 OG17 OG18 OG19 OG20 OG2022 If $$r > 0$$ and $$s > 0$$, is$$\frac{r}{s}<\frac{s}{r}$$ ?(1)$$\frac{r}{3s}=\frac{1}{4}$$(2)$$s = r + 4$$
190407 a,b,c,d are integers. 1 ≤ a,b,c,d ≤ 9.(a+d)(b+c)=? 1：abcd+dcba=7557. 2：abcd+dca=1832
190321 Is there a solution to the equation ax^2+bx+c=0? 1：a>b 2：b>1/2
If S is the infinite sequence $${S}_{1}={9}$$, $${S}_{2}={99}$$, $${s}_{3}={999}$$ . . ., $${S}_{k}={10}^{k}-{1}$$, . . ., is every term in S divisble by the prime number p ?(1)p is greater than 2.(2)At least one term in sequence S is divisble by p.
In the xy-plane, line a and line b have the same slope. If the y-intercept of line a is –1, what is the y-intercept of line b ? (1) The x-intercept of line a is –1.(2) Line b passes through the point (10, 20).
190310 k is a positive integer. Is k+1 a prime number?
1: k is not a prime number.
2: k is a factor of 30.
OG18-数学分册 In which of the following pairs are the two numbers reciprocals of each other?I. 3 and $$\frac{1}{3}$$II. $$\frac{1}{17}$$ and $$-\frac{1}{17}$$III. $$\sqrt{3}$$ and $$ \frac{\sqrt{3}}{3}$$
Magoosh If xy = 5 and $$x^{2} + y^{2} = 12$$, then$$ \frac{x}{y} + \frac{y}{x} $$=
OG18-数学分册 For a light that has an intensity of 60 candles at its source, the intensity in candles, S, of the light at a point d feet from the source is given by the formula $$ S = \frac{60K}{d^{2}}$$, where k is a constant. If the intensity of the light is 30 candles at a distance of 2 feet from the source, what is the intensity of the light at a distance of 20 feet from the source?
PREP07 Test 1 If x is positive, is x > 3 ? (1)$${(x-1)}^2\gt4$$ (2)$${(x-2)}^2\gt9$$
300难题 What is the value of x ? 1.$$4^{x+1}$$ +$$4^{x}$$ =320 2.$$x^{2}$$=9
190415 f(x)=ax+b.f(3)=? 1：f(-2)+f(3)=0 2：f(2)+f(-1)=0
191031 Here are two columns of numbers, the numbers in the left column are arranged in numerical order, and the right column is ordered according to the frequency of the numbers. What's the median?
1 ...... 4
2 ...... 9
a ...... 1
5 ...... b
(1)a=3
(2)b=2
GMAT、gmat题库、gmat模考、gmat考满分In the figure, each side of square ABCD has length 1, the length of line segment CE is 1, and the length of line segment BE is equal to the length of line segment DE. What is the area of the triangular region BCE?
If $${9}{x}={27}^{y}$$, which of the following expresses x in terms of y?