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190302 x,y are positive integers. Does x consist of the sum of the squares of two positive integers? 1: x is prime. 2: x=4y+1（0 < y <5）
If n is the product of the integers from 1 to 8 inclusive, how many different prime factors greater than 1 does n have?
190321 x,y are positive integers. x>y. Is $$x^{y-1}$$ odd?
1: x-y is even.
2: x+y is even.
OG19-数学分册 In the xy-plane, circle C has center (1,0) and radius 2. If line k is parallel to the y-axis, is line k tangent to circle C? (1) Line k passes through the point (-1,0). (2) Line k passes through the point (-1,-1).
PREP07 Test 1 Pat bought 5 pounds of apples. How many pounds of pears could Pat have bought for the same amount of money?(1) One pound of pears costs $0.50 more than one pound of apples.(2) One pound of pears costs $$1\frac{1}{2}$$ times as much as one pound of apples.
Magoosh What is the ratio of x to y?(1) The ratio of 0.2x to 3y is 1 to 6.(2) y is 40 less than twice x.
Magoosh $$\sqrt{0.00001}$$=
190215 The square is inlaid with an octagon. The circumference of the octagon is 16. What's the circumference of the square?
If $$\frac{4x}{7}{y}={1}$$, then what is the value of 3x + 5y ?1. x + 4y = 232. $${y}^{3}={64}$$
PREP07 Test 1 If x is a negative number, what is the value of x ? (1) $$x^2=1$$ (2)$$x^2+3x+2=0$$
Manhattan If x and y are positive integers, is (x + y) a prime number?(1) x = 1(2) y = 2 * 3 * 5 * 7
300难题 If m and n are positive integers, is n even? 1.m(m + 2)+ 1 = mn 2.m(m + n)is odd.
PREP07 Test 2 GMAT、gmat题库、gmat模考、gmat考满分All points (x, y) that lie below the line l, shown above, satisfy which of the following inequalities?
How many thousands of gallons of water does a reservoir have?1. If $$\frac{1}{3}$$ of the water in the reservoir were released, then the reservoir would be filled to $$\frac{1}{2}$$ of its capacity.2. If 60 thousand gallons of water were pumped into the reservoir, it would be filled to capacity.
OG17 A certain assembly project requires the completion of each of 5 tasks. In the diagram, the tasks are represented by circles labeled A–E and the number above each circle represents the number of days needed to complete the task. Arrows indicate prerequisite tasks. For instance, the arrow from Task A to Task C indicates that Task A must be completed before Task C can be started. Unless otherwise prohibited by these constraints, several tasks can be worked on at the same time. The project is complete once all 5 tasks are completed.Use the drop-down menus to create the most accurate statements based on the information provided.GMAT、gmat题库、gmat模考、gmat考满分A. The least number of days needed to complete the project is days.B. If the number of days needed to complete Task C is increased by 1 day, then the least number of days needed to complete the project
Magoosh $$x^n + x^n + x^n = x^{n+1}$$What is the value of n?Statement #1:$$x^n=9\sqrt3$$ Statement #2: x = 3
Magoosh Point (P, Q) is in the coordinate plane. Is P > Q?Statement #1: P is positive.Statement #2: Point (P, Q) above the line y = x + 1.
190215 x+y is a multiple of 35. x=? 1: The reminder is 1 when x is divided by 5. 2: The reminder is 2 when x is divided by 7.
Ready4

If is a positive integer, then is
Ready4

The sequence s1, s2, s3, ...sn, ...,sn,...is such that sn = \frac{<font color='#FE8080'>1</font>}{n} - \frac{<font color='#FE8080'>1</font>}{n + <font color='#FE8080'>1</font>} for all integers n \geq <font color='#FE8080'>1</font>. If k is a positive integer, is the sum of the first k terms of the sequence greater than \frac{9}{10}?

(1) k > 10

(2) k < 19