[計量] 請教印度JJ
http://www.drrajusgre.com/forum/viewtopic.php?t=7200
11. In a shop, the discount are as follows.
A 40% discount on each coat and 20% discount on each shirt.
If a person buys 2 coats and 1 shirt,
then what is the total discount he gets on buying?
網站後面的回覆寫說是33.33%
個人猜測答案來源是(40%+40%+20%)/3=33.33%
但是不清楚為什麼是這樣算
http://www.drrajusgre.com/forum/viewtopic.php?t=7228
17. If 5^3w+5^2x+5y+z=0, then what is value of w+x+y+z?
這題我是假設3w=2x=5y=0 => w=x=y=0 =>z=-2
=>w+x+y+z=-2
不知這樣解答案合不合理
http://www.drrajusgre.com/forum/viewtopic.php?t=7231
1. Given 9^x=47. What is the nearest integer of 3^x?
A. 5
B. 7
C. 11
D. 12
4. In a hotel, the roo numbers of a floor are numbered from 101 to 550.
If particular rooms selected are of numbers that start with 1,2,3
and lasts with 4,5,6, then in how many ways the rooms can be selected?
這題我算出的答案是11999 (印象中好像在前幾天的[回報]裡有看到類似的)
算法:C5取3*10*C10取3-1=11999 (減一是因為要去掉數字100,房號從101開始)
如果答案or算法不對 麻煩糾正
12.(這題的表格請參考網站 我不會畫圖 >"<)
The table shown gives the reading of a car at three stops 'A', 'B', and 'C'
If the car gets filled up to full tank at each stop,
then find the ratio of numbers of miles travelled to number of liters used?
http://www.drrajusgre.com/forum/viewtopic.php?t=7237
5. Given that a vending machine dispenses gumballs in a regularly repeating
cycle of ten different colors. If a quarter buys 3 gumballs,
what is the minimum amount of money that must be spent before three
gumballs of the same color are dispensed?
以上幾題麻煩板上各位高手幫忙了
11/5就要考試 居然還遇到不會算的題目 整個很焦慮 >"<
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