# (急!!)GRE數學題

--------------------------------------------------

a) a的答案較大

b) b的答案較大

c) 兩相等

d) 無法計算

--------------------------------------------------------------------------------------

10)

The toll for a certain bridge is \$0.15 or 1 token. Tokens are sold in packs of 40 for \$4.00.

a) The percent saved on 40trips across the bridge if a token, rather than \$0.15, is used to pay each toll.

b) 66又2/3%

----------------------------------------------------------------------------------------

12)

a) The average (arithmetic mean) cost per cassette for 18 cassettes costing a total of 2x dollars

b) The average (arithmetic mean) cost per cassette for 3 cassettes costing a total of x/3 dollars

--------------------------------------------------------------------------------------

16)

If 8750 pairs of shoes are represented in the pictograph above, how many pairs of shoes does each (鞋子) represent?

a) 350 b) 700 c)730 d)830 e)1400

-------------------------------------------------------------------------------------

30)

Two tanks, X and Y, are filled ro capacity with jet fuel. Tank X holds 600 gallons more than tank Y. If 100 gallons of fuel were to be pumped from each tank, tank X would then contain 3 times as much fuel as tank Y. What is the total number of gallons of fuel in the two full tanks?

a)1400 b)1200 c)1000 d)900 e)800

hillngreen 你好

BIG BOOK的答案是1400ㄝ

### 1 個解答

• 最佳解答

10)

The toll for a certain bridge is \$0.15 or 1 token. Tokens are sold in packs of 40 for \$4.00.

a) The percent saved on 40trips across the bridge if a token, rather than \$0.15, is used to pay each toll.

(0.15*40-4)/6=33.333333%

b) 66又2/3%

12)

a) The average (arithmetic mean) cost per cassette for 18 cassettes costing a total of 2x dollars=2x/18=x/9

b) The average (arithmetic mean) cost per cassette for 3 cassettes costing a total of x/3 dollars=( x/3)/3=x/9

16)

If 8750 pairs of shoes are represented in the pictograph above, how many pairs of shoes does each (鞋子) represent?

a) 350 b) 700 c)730 d)830 e)1400

用8750除以pictograph上鞋子的全部數目

30)

Two tanks, X and Y, are filled ro capacity with jet fuel. Tank X holds 600 gallons more than tank Y. If 100 gallons of fuel were to be pumped from each tank, tank X would then contain 3 times as much fuel as tank Y. What is the total number of gallons of fuel in the two full tanks?

a)1400 b)1200 c)1000 d)900 e)800

x=600+y

600+y-100=3*(y-100)

y+500=3y-300

y=200

x=800

x+y=1000

2008-10-26 23:06:02 補充：

走四十趟，要用四十張票，一張0.15元，所以要用6元，回數票只要4元。

這一個是算數±弄錯了，不好意思，應該是2y=800，所以y=400 x=1000

總共1400。