43. 452*36*17 7 个数字中，哪个数字增加1，乘积增加小于1000？ A. 1 B. 2 C. 5 D. 7 E. 4
44. N 有几个不同的质数？ A. N 是7200的因子 B. 180 是N的因子
45． M, P, T 是positive integer, m A. T-P=P-M B. Forgot
46. 一个序列，从第三位数起，每个数都与它前面连续的两个数的和有关，the number is the sum of the 2 numbers in the sum is odd or ½. if the sum of the 2 numbers are even, the forth number is 7 and the fifth number is 5, what is the first number?
47. Give the English definition of standard deviation, 2 or 3 lines, there are 4 numbers, 9, 8, 7, 4, ask the standard deviation of these 4 numbers?
48. X, Y 是正整数，X 是3的倍数吗？ A. X-Y 是3的倍数 B. X-2Y是3的倍数
49. N除以3的余数是多少？ A. N除以2 余1 B. N 1除以3 余2
50. 正方体内有以内切球，直径为6，求正方体内最长的一条对角线长度
51．一正方形，10 <长< 20, 5<宽<9, 求周长范围
52． A. S, T 关系 B. t > 1 题目记不清，但是通过A, 求出T 有两值1，2，根据B，可确定T=2, 则答案选C
53. 卖门票 on Monday &. Tuesday, children’s ticket $7 each, adult $10 each, children’s number on Tues is twice the number on Monday, adult’s number on Tues is ½. the number on Monday, the total revenue on Monday is $2700, revenue on Tuesday is $2400, what’s the children’s number on Monday?
54. –2
55．3个不同的旗子排列视为一个信号，有四面不同的旗子，可排成几个信号？
56．从50加到100的和？
57．孩子们拿笔，either 3 pens , 2 pencils, or 1 pen, 3 pencils, the average pen number is 1.6, what’s the average pencils number? (the number is not accurate)
58. lottery $16 billion, separate as gifts, government payment, and expense, give the relation of payment and gift &. the relation of payment and presentation, ask the payment in $ amount
59. 7 red tomatoes, 5 green tomatoes, ask the probability of all 3 tomatoes are red ….