GMAT If x and y are positive integers,and x^3*y^4=2000.What is the value of xy?这个...有木有技巧...

GMAT If x and y are positive integers,and x^3*y^4=2000.What is the value of xy?这个...有木有技巧... gmat数学DS部分 prep上的一道题,gmat数学DS部分 prep上的一道题,也看不到答案.177.If x and y are positive integers,what is the value of xy (1) The greatest common factor of x and y is 10.(2) The least common multiple of x and y is 一道GMAT数学题求解.If y≠3 and 3x/y is a prime integer greater than 2,which of the following must be true?1.x=y2.y=13.x and y are prime integers.A NoneB 1 onlyC 2 onlyD 3 onlyE 1 and 3答案给出的是A，我觉得选B，请问条件1有什 求解一道Gmat数据充分题If x and y are integers,is y an even integer?(1) 2y – x = x^2 – y^2(2) x is an odd integer.条件（1）单独就是充分的 求问一道GMAT数学题!貌似挺简单= =就是卡在这了If 2, x, y, and z are different positive integers whose average (arithmetic mean) is 10, what is the greatest possible value of z ?A. 10B. 24C. 34D. 36E. 40 GMAT数学求解If x, y, z areinteger and xy+z is an odd integer, is x an even integer?1) xy+xz is an even integer2) y+xz is an odd integer 问一道GMAT数学?If 500 is the multiple of 100 that is closest to x and 400 is the multiple of 100 that is closest to y,which multiple of 100 is closet to x+y?(1) x+y(2) y GMAT One number will be chosen randomly from each of the sets above.If x represents the chosen number of the set X and y represents the chosen number of the set Y.What is the probability that x/y is an integer? if x and y are the tens digit and the units digit, 求翻译!if x and y are the tens digit and the units digit, respectively, of the product 725,278X(这个是乘号）67,066,what is the value of x+y? Gmat 看题列等式Q17:To be eligible for retirement benefits at the Omega Corporation,the sum of an employee’s age,in years,and the number of years of employment must be at least 70.If x,where x < 70,is a certain employee’s age when hired and y If x,y,and k are positive numbers such that [X/(X+Y)]*10+[Y/(X+Y)]*20=k,and if x < y,which of the following could be the value of A.10B.12C.15D.18E.30 GMAT数学题求教Q19:A total of $60,000 was invested for one year.But of this amount earned simple annual interest at the rate of x percent per year,and the rest earned simple annual interest at the rate of y percent per year.If the total interest GMAT一道数学题（data sufficiency）If l1,l2 and l3 are lines in a plane,is l1 perpendicular to l3?(1)l1 is perpendicular to l2 (2)l2 is perpendicular to l3是不是错了? 代数应用题!The profits made by selling a hamburger and a can of soft drink are $x and $y respectively.If 28 hamburgers and 20 cans of soft yesterday,what was the total profit made? 紧急!12月考 20135月SAT数学If the circumference of a cir le is doubled when its radius r is increased by 4 inches, what is the value of r, in inches?3y=2x-6 y=1-cxIn the equations above,x and y are variables and c is a constant. If no ordered three grades of milk are 1percent,2percent,3percent fat by volume,if x gallon of 1 percent,y gallon of 2percent and z gallon of 3percent are mixed to give x+y+z gallons of a 1.5percent grade ,what is x in terms of y and 1．　If　x　and　y　are　integers　and　xy＋x＾2　is　oddh　which　of　the　following　statements　must　be　true?①　x　is　odd②　y　is　odd③　x＋y　is　oddA．　①B．　③C．　①　and　②D．　①　an If y = f(u) and u = g(x),where f and g are twice differentiable functions,show thatd2y/dx2 =d2y/du2 (du/dx)＾2 +dy/du(d2u/dx2)f 和 g 两次微分