单选题If n is an integer, is n15 an integer? 1 3n15 is an integer. 2 8n15 is an integer.
单选题数字2，3，4，5，6，7，0可以组成多少个两位数。
单选题求the mode of 0，0，1，1，3，3，3，4，5。
单选题How many hours were budgeted for a certain job?1The number of hours budgeted for the job plus the actual number of hours used for the job was 140.2 The actual number of hours used for the job minus th
单选题Jay: Of course there are many good reasons to
单选题某人从甲地至乙地，可以乘飞机和火车，假设飞机每日3班，火车每日4班，那么此人从甲地至乙地旅行一共有多少种不同的方式?
单选题A two-year study beginning in 1977 found that,
单选题Boreal owls range over a much larger area than
单选题某项工程A、B两队合作完成需要12天，B、C两队合作需要15天完成，A、C两队合作需要20天完成，如果由A、B、C三队合作需要多少天完成?
单选题How many people in Town X read neither the World newspaper nor the Globe newspaper?1 Of the 2，500 people in Town X，1，000 read no newspaper． 2 Of the people in Town X，700 read the Globe only and 600 re
单选题k and s are two positive integers such that k＞s, if k×s=132, what is the total number of possible values of k?
单选题A certain online form requires a 2-digit code for the day of the month to be entered into one of its fields such as 04 for the 4th day of the month．The code is valid if it is 01，02，03…31 and not valid
单选题4个*号和2个?号一共能够组成多少种可能的密码?
单选题Both x and y are positive integers. Is x divisible by 3?1x-y is divisible by 3.2x-2yis divisible by 3.
单选题If the price of the clothes increases from $20 to $25, what is the percent increase in price?
单选题Three dice, each with faces numbered 1 through 6, were tossed onto a game board. If one of the dice turned up 4, what was the sum of the numbers that turned up on all three dice?1 The sum of two of th