单选题If the integer k has remainder 7 when divided by 8, what is the remainder when 3k is divided by 4?
单选题X, Y are in a set which has property P that any real number between X, Y also belongs to the set, which of the following is the set having property P?
单选题If b is the product of three consecutive positive integers c, c + 1, and c + 2, is b a multiple of 24?1 b is a multiple of 8. 2 c is odd.
单选题The difference 942—249 is a positive multiple of 7． If a，b，and c are nonzero digits，how many 3-digit numbers abc are possible such that the difference abc—cba is a positive multiple of 7?
单选题Cocoa grown organically on trees within the
单选题The median of x, 15, 10 and y is 18.5. If x＜y, what’s the value of x?
单选题Rats injected with morphine exhibit decreased
单选题In the first 2 hours after Meadow’s self-service laundry opens, m large washing machines and n small washing machines are in continual use. Including the time for filling and emptying the washing mach
单选题Economist: Paying extra for fair-trade
单选题If x, y, and z are positive integers and 2x=3y=5z=7w, then the least possible value of x+y+z+w is
单选题有一个球从人行道上8米高的窗户处扔下，每一次反弹都是上一次下落距离的一半，求第五次反弹的高度?
单选题What is the least number of digits including repetitions needed to express 1.23456789×10200 in decimal notation?
单选题书架上有10本不同的音乐杂志，5本不同的数学杂志，4本不同的美术杂志，取这三种杂志各一本，问有多少种不同的取法?
单选题How many cubic centimeters of a solution that contains 15 grams of glucose per 100 cubic centimeters must be added to 45 cubic centimeters of a solution that contains 25 grams of glucose per 100 cubic
单选题在某一种溶液中，牛奶、酒精、水的比例是4：100：200；现在溶液发生了改变，牛奶、酒精的比例增倍，而牛奶、水的比例减半，如果改变后的溶液一共含有1000立方厘米的酒精，那么溶液中含有多少立方厘米的水?
单选题The number n is between 2 and 8, inclusive, on the number line means which of the following?