if y is an integer ,then the least possible value of /23-5y/ isA (1) B(2) C(3) D(4) E(5)请说为什么?

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 If x is a prime number,y is an integer ,and x^(21-x)=x^(y^2+3),then xy^2=_____ if y is an integer ,then the least possible value of /23-5y/ isA (1) B(2) C(3) D(4) E(5)请说为什么? If is given that N is an integer.Prove that (a) 3(2N-1)+1 is an even number. 1.If x is an integer greater than 1 and if y = x + 1/x,which of the following must be true?I.y x II.y is an integer.III.xy > x^2 (A) I only (B) III only (C) I and II only (D) I and III only (E) I,II,and III 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 If y is the smallest positive integer such that 3,150 multipliedby y is the square of an integerthen y must be:A、2 B、5 C、7 D、14 If k is a positive integer,which of the following must represent an even integer that is twice the value of an odd integer答案是4k+2 【GRE数学】If x is an odd integer,for which of the following equations must y be an even integer?RT 其他选项都排除了,只剩x+2y=7 & 2x+y=6PS.by the way,integers between 1 and 100,包括1和100这两个数吗? GWD GMAT数学2道1,If y is the smallest positive integer such that 3,150 multiplied by y is the square of an integer,then y must beA.2B.5C.6D.7E.14第二题如图（此题是不是错了?） GRE猴哥112数学难题 40题if n is an integer and 99< n的平方 翻译if an integer is three times as large as the sum of the figures in its digit x≡(1/4) (mod 9) ,x∈Z,表示什么意义?显示多少?What would it mean to say there is an integer x equal to (1/4) mod If it is meaningful to say there is such an integer,what is it?Is there an integer equal to (1/3) mod If so,what is it? 英语翻译Is the positive integer n equal to the square of an integer?Can you give the reasoning for this qn Is the positive integer n equal to the square of an integer?(1) For every prime number p,if p is a divisor of n,then so is p2.(2) square ro If p is an odd integer,which of the following is an even integer?A.p – 2 B.p2 C.p2 – 2 D.(p – 2)2 E.p2 – p let n≥2 be an integer.prove that n is prime if and only if for every integer a,either hcf(highest common factor) (a,n)=1 or a|n An integer c is a common divisor of two integers x and y if and only if c is a divisor of x and c is a divisor of y.Which of the following sets of integers could possibly be the set of all common divisors of two integers?A.{-6,-2,-1,1,2,6}B.{-6,-2,-1 If 1050 – 74 is written as an integer in base 10 notation,what is the sum of the digits in that integer?A.424B.433C.440D.449E.467是10^50