|
Manhattan
|
What is the average of $$\frac{1}{2}, \frac{2}{5} and\frac{ 3}{10}$$?
|
|
181215
|
A post office issued 10 of new stamps. Someone collected three of them. If two of the 10 stamps are chosen, what is the probability that none of the two stamps will be included in the three collected by this person?
|
|
OG12 OG15 OG16
|
Of the final grades received by the students in acertain math course, $$\frac{1}{5}$$ are A's, $$\frac{1}{4}$$ are B's,$$\frac{1}{2}$$ are C's,and the remaining 10 grades are D's. What is the number of students in the course?
|
|
Ready4
|
The sum is between
|
|
Ready4
|
What is the value of  ?
(1)  "y^2+3=2(y+<font color='#FE8080'>1</font>)")
(2) 
|
|
Magoosh
|
Three friends are buying a gift for a friend. Declan contributes 4 dollars more than$$\frac{1}{4}$$ the cost of the gift, Ed contributes 1 dollar less than $$\frac{1}{3}$$ the cost of the gift, and Frank contributes the remaining 22 dollars. What is the cost of the gift?
|
|
300难题
|
A large flower arrangement contains 3 types of flowers: carnations, lilies, and roses. Of all the flowers in the arrangement, $$\frac{1}{2}$$ are carnations, $$\frac{1}{3}$$ are lilies, and $$\frac{1}{6}$$ are roses. The total price of which of the 3 types of flowers in the arrangement is the greatest?
1.The prices per flower for carnations, lilies, and roses are in the ratio 1:3:4, respectively.
2.The price of one rose is $0.75 more than the price of one carnation, and the price of one rose is $0.25 more than the price of one lily.
|
|
190207
|
∠A=90°, AB=AC. Circle O inscribed on triangle ABC. The radius of the circle is . AO=？
|
|
Magoosh
|
If x and y are positive integers, is $$x^2y^2$$ even ?(1) x + 5 is a prime number(2) y + 1 is a prime number
|
|
|
If r, s, and w are positive numbers such that w = 60r + 80s and r + s = 1, is w < 70?(1)r > 0.5(2)r > s
|
|
|
If x and y are positive, what is the value of $$x -y$$?(1)$$\frac {x^2-y^2} {x+y}={1}$$(2)$$x+y=7$$
|
|
|
What is the tens digit of positive integer n?(1) The hundreds digit of 10n is 2(2) The tens digit of n-9 is 1
|
|
191031
|
According to the table, what is the median?
(1)4≤y≤7
(2)1≤y≤4
|
|
PREP07 Test 1
|
If 0 < x < 1, what is the median of the values x, $${x}^{-1}$$, $${x}^{2}$$, $$\sqrt{x}$$, and $${x}^{3}$$?
|
|
|
If $${N}=\frac{S}{1-pq}$$ and N,S,p, and q are positive numbers, then in terms of N,S, and q what does p equal?
|
|
OG19-数学分册
|
If pis a positive integer, is $$2^{p} + 1$$ a prime number?
(1) p is a prime number.
(2) p is an even number.
|
|
|
If x and y are integers, is x + y greater than 0?(1)x is greater than 0.(2)y is less than 1.
|
|
|
The value of $$-{3}+\sqrt{9-k}$$ is positive for which of the following values of k ? I. -1 II. 0 III. 1
|
|
PREP07 Test 2
|
If x and y are integers, is the value of x(y + 1) even? (1) x and y are prime numbers. (2) y > 7
|
|
PREP07 Test 2
|
Does the integer k have a factor p such that 1 < p < k ?(1) k > 4!(2) $$13! + 2 \le k \le 13! + 13$$
|