New Math problems 12/19(转自Robert之家)

2002-12-21 19:11:04

我今天在USA考的,遇到超多JJ題,所以很感謝,雖然還是沒有很好的成績,不過已經很開心了!

1. In supermarket, Jack spent 1/2 of his money on meat, 1/3 on milk, 1/10 on fruit, and he bought candy with the remaining 6 dollars. How much did he spend in the supermarket?
Ans: 90元

2. 數列102, 108, 114,....Sn...., from 第四項開始Sn= S(n+1)-6(not sure), which number is from this 數列? 答案忘了好像是642. 我是想那個數字減6後應該要能被6整除.

3.這題我也遇到:
154. 我遇到一题, 我认为可能是题目有误, 也可能是我理解有问题, 我已经报告给了管理员, 大家帮着看一看：题目是: 1994年, 一个公司总共往外发传真80 BILLION, 已知其从1987年开始, 每年发的传真数比上年增长(INCREASED BY )700%, 求其1987年发了多少BILLION传真? 答案最小的是10. 还有11.4等等, 有几十的, 最大的有几百的.
我也是這樣的想法所以解不出來,最後瞎猜11.4

4. JJ題不過數字是260million為1.3trillion的百分之幾? 1000million=1billion, 1000billion=1trillion.
Ans: 0.02%

5. In one company,50% of male employees are at least 35 years old, and 40% of female employees are at least 35 years old. There is 42% of the employees are at least 35 years old. Ask the proportion of female workers in the company.

DS題
1. X is a positive interger, find the value of X.
(1) X divided by 100 the remainder is 30
(2) X divided by 110 the remainder is 10

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