2009甲骨文网测题-Math& Sentence Structure 部分

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Math部分

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1_The gross monthly income of two salesmen Alex and Barry are in the ratio 3:4 and their monthly expenditure is in the

ratio of 4:5. Find the ratio of their net income (net income = gross income – expenditure) given that Alex’s

expenditure is 1/6th of his gross income.
2_Robert spent $165 to buy 30 tools such that the number of hammers to lathes to chisels was 1:2:3. If the cost of a

chisel was half the cost of a lathe and one third the cost of a hammer, then what is the cost of a hammer?
3_Convert 214.20 from base 8 to base 10.
4_The price of fuel goes up by 20%, so Patty reduces her consumption so that her expenditure on fuel rises by only 8%.

By what percentage does she reduce her consumption?
5.A grocer uses a false weight in order to sell an item at 25% additional profit, but is in turn underpaid by a customer

by 20%. What is the net impact of this transaction for the grocer?
6_What is 134 X 220 in the number system with base 5
7_The average annual contribution per donor to a charity is $150. At the end of every year, the charity deposits the

amount in a bank which offers 10% interest annually. For the first year there are 100 contributors. If the number of

contributors rises by 10 every year and the average contribution rises by $20 every year, then what is the amount

saved by the charity at the end of 3 years?

8_If a = 3b/5 and x = 7y/9, then what is the value of (5ax-2by)/(2ay-bx)?

 

Sentence Structure 部分
1_There are two bags, the first containing R red marbles and the second containing B blue marbles. From the first bag X

marbles are randomly selected and transferred to the second bag, and then from the second bag, Y marbles are

randomly selected and transferred to the first bag. After this, the likely number of red marbles in the first bag is:

2_Two queues , Q1 and Q2, for a railway ticket move at the rate of X and Y people per hour respectively. Q1 has N1

people in it and Q2 has N2 people in it. If you choose Q1, then which of the following must be true for you to reach

the ticket window in the least amount of time as possible?

3.X sweets are divided by a father among 4 children, such that each child gets as many sweets as his or her age in years.

If the difference in age between each of the children from the next younger or older sibling is 2 years and the

youngest child is A years old, which of the following represents how many sweets remained after the distribution?