单选题Rita and Sam play the following game with n sticks on a table. Each must remove 1, 2, 3, 4 or 5 sticks at a time on alternate turns, and no stick that is removed is put back on the table. The one who
单选题In a certain pentagon ABCDE，AE⊥AB，AB⊥BC and BC⊥CD. If AB=10 and BC=8.which of the following could be the perimeter of this pentagon?
单选题There are 30 students in a class. 12 of them play basketball, 15 of them play football, and 19 of them play pingpang. If 7 of them play all three activities and exactly 6 of them play two activities,
单选题If 5＜x＜10 and 0＜y＜32, which of the following gives all possible values of xy?
单选题Is xy6?1 x3andy2. 2 1223 and y2 64.
单选题Which of the following is equal to an integer raised to the third power?
单选题小明的贮钱罐里一共有9.45元的硬币，硬币共有四种。5分硬币和5角硬币的数目相同，1角硬币的个数是5分硬币数目的3倍。那么小明至少有多少个1分硬币?
单选题It is often said that high rates of inflation
单选题What is the greatest common divisor of positive integers m and n?1m is a prime number, n=2.2m and n are consecutive integers.
单选题Political Advertisement:Mayor Delmont's critics
单选题Music critic: Fewer and fewer musicians are
单选题Which of the following numbers is NOT the sum of three consecutive odd integers?
单选题The top surface area of a square tabletop was changed so that one of the dimensions was reduced by 1 inch and the other dimension was increased by 2 inches. What was the surface area before these chan
单选题已知等差数列2，5，8，11，14，…，问47是其中的第几项?
单选题In an experiment, volunteers walked individually
单选题A company plans to develop a prototype weeding
单选题If m and n are positive integers, is n even?1 mm + 2 + 1 = mn2 mm + n is odd.