Given that x and y are integers. At the time y minutes past x in the morning, the angle formed by the minute hand and the hour hand is 100∘. Find the least possible value of x+y. 已知x和y都是整数,而且在上午x时y分的时候,时针和分针形成的角度约为100∘.求x+y的最小可能值...
11. 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 and ③E. ② and ③2. For how many integers n is (2n+1)(3n-1) a negative number?A. NoneB. OneC. ...
把这两个式子代入xy+1可得: xy+1=(3m+1)(9n+8)+1 =27mn+24m+9n+84-1 =3(9mn4-8m+3n+3) 因此xy+1能被3整除,所以(1)+(2)充分。结果一 题目 If a, b, and c are integers, is the number 3 (a+b)-c divisible by 3 ?() (1)a+b is divisible by 3. (2)c is divis...
If x and y are integers such that x3 = y2, which of the following could not be the value of y (A) -1(B) 1(C) 8(D) 16(E) 27 相关知识点: 试题来源: 解析 D Test each choice until you find the correct answer. Could y = -1 Is there an integer x such that x3 = (-1)...
GRE数学题 If x and y are integers and x>y>0If x and y are integers and x>y>0,how many integers are there between ,but not including,x and x-y-1 答案 题目:xy是整数,并且x>y>0,有多少个不包括xy在内的整数在xy之间.我觉得用直接代数求就行,比如x是5,y是2,然后选符合的那个选项...
因为任意两个数x、y，从x到y一共有x-y+1个数。而题目问的是这两个数之间有几个数（不包括这两个数）所以这两个数之间自然就是有x-y+1-2=x-y-1个数了 方便理解的话，可以把x和y用具体数字带入 比如x=3，y=1 从x到y一共有3个数，两个数之间有1个数 ...
If x and y are integers whose least common multiple is a perfect square and whose greatest common divisor is a prime number,which could represent the ordered pair (x,y)?The answer is (18,4) ; but I just dont know why (9,1) couldn't be the right answer,I figure it is right,too...
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 答案 From (1),we can know that x^2+x=y^2+2y.Because x is an odd integer,x^2 is an odd integer too.So the resuit of x^2+...
答案是错误的，谁说x/y是偶数就x/y一定是偶数啊，比如6/2=3。所以2其实想说的是x/y答案是一个...
If x and y are integers, is x + y greater than 0?(1)x is greater than 0.(2)y is less than 1. 选项: A、 Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B、 Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C、 BO...