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

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 GMAT一道数学题, 一道GMAT的数学题 一道关于GMAT的数学题 求解GMAT一道数学题[1/(2n-1)!]-[1/(2n+1)!]简化后等于an^2+bn+c,问a+b+c等于多少? 求解一道GMAT数学题Note: Figure not drawn to scale. The figure shows a square patio surrounded by a walkway of width x meters. If the area of the walkway is 132 square meters and the width of the patio is 5 meters greater than the width of the 请大神讲解一道GMAT数学题……Ify is an integer,then the least possible value of|23 —5y| is(A) 1(B) 2(0 3(D) 4(E) 5 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 一道数学题大神求解! 一道数学题不会求解 求解一道抛物线数学题. 一道数学题求解 求解一道解析几何数学题 一道数学题求解速度 一道数学题,.,.求解,谢谢 高分求一道GMAT数学题.The rate of a chemical is directly proportionate to the square of A and inversely to B,if B increase 100%,what is the change of percentage of 问一道GMAT的DS题a school administrator will assign each student in a group of n students to one of m classrooms. if 3 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?