单选题If an integer n is divisible by both 12 and 15, it must also be divisible by which of the following?
单选题State X has a sales tax rate of k percent on all purchases and State Y has a sales tax rate of n percent on all purchases. What is the value of k - n ?1 The sales tax on a $15 purchase is 30 cents mor
单选题If x is an even integer, which of the following is an odd integer?
单选题Which of the following is the coefficient of xy in3x+4y-xy4x+3y+1?
单选题Archaeologists working in the Andes Mountains
单选题A certain mathematical operation may be represented by the symbol@. For all nonzero a and b, does a@b=b@a?1m@n=12, for all nonzero m.2a@6=aba2+b2, for all nonzero a and b.
单选题Each of the five divisions of a certain company sent representatives to a conference. If the numbers of representatives sent by four of the divisions were 3, 4, 5, and 5, was the range of the numbers
单选题Khalil drove 120 kilometers in a certain amount of time. What was his average speed, in kilometers per hour, during this time?1 If Khalil had driven at an average speed that was 5 kilometers per hour
单选题If x and y are integers, is xy + 1 divisible by 3 ?1 When x is divided by 3, the remainder is 1. 2 When y is divided by 9, the remainder is 8.
单选题在某个数列中，从a1开始每一项都比前一项多x，a1=12，a41=92，问x的值为多少?
单选题有1，2，3，4，5五个数，如果偶数不能够相邻，问能够构成多少个5位数?
单选题The sustained massive use of pesticides in
单选题What is the least positive integer that is divisible by each of the integers 1 through 10, inclusive?
单选题When - of a certain number is subtracted from the number and then this difference is added with 20, the result is the original number. What is the original number?
单选题What is the least common denominator of 27, 15 and 23?
单选题Typically during thunderstorms most lightning
单选题Which of the following, if true, most logically
单选题Super Express Shipping Company has implemented a