評(píng)論
打印
1. l1, l2 and l3 are three lines in space
The number of points at The number of points at
which lines l1 and l2 intersect which lines l2 and l3 intersect
1，三條肆意直線，L1和L2的交點(diǎn)的個(gè)數(shù)與L2和L3的交點(diǎn)的個(gè)數(shù)沒(méi)關(guān)。
2. The number of 1/4-inch lengths in 1
a 4-inch length
2，是問(wèn)4英尺中有若干好多個(gè)1/4英尺，應(yīng)該是16個(gè)，所以A
3. The maximun number of solid cubes 4
having edges of length 1/2 meter that
can be placed inside a cubical box
having inside edges of length 1 meter
3邊長(zhǎng)為1的立方體里最多能放下幾個(gè)邊長(zhǎng)為1/2的立方體，當(dāng)然是8個(gè)咯
4. Cube C has volume 8 cubic centimeters
The area of one of the faces of cube C 3 square centimeters
4立方體體積是8，那一個(gè)面的面積當(dāng)然是4咯
5. Ms.Smith got an 8 percent cost-of-living raise of $20 per week
Ms.Smith's new weekly salary $260
5 x*0.08=20，那x+20=270>260
6. On a certain number live, if -7 is a distance of 4 from n and 7 is a distance of 18
from n then n=
A.25 B.11 C.3 D.-3 E-11
6應(yīng)該是-11
7. For all real numbers a and b. if a?b=a(a+b), then a?(a?b)=
A. a2+ab B a2+ab+a C a2+a+b D a3+a2b E a3+a2b+a2
注：a2暗示a平方，a3暗示a立方
7新界說(shuō)的運(yùn)算a?b=a(a+b), 那a?(a?b)=a?(aa+ab)=a(a+aa+ab)=aa+aaa+aab
8.secretary typed 6 letters,each of which had either 1 or 2 pages.If the secretary typed 10 pages in all, how many of the letters had 2 pages?
A 1 B 2 C 3 D 4 E 5
謎底是D，問(wèn)題問(wèn)題我都看不懂，是啥意思呢?
這是說(shuō)秘書打六封信，沒(méi)一封信要1頁(yè)或者兩頁(yè)。如不美觀秘書總共打了10頁(yè)，那么有若干好多封信是兩頁(yè)?
解答：設(shè)有x封，則2x+(6-x)=10,解得x=4.
9 how many of the five numbers above are each equal to the product of an integer and an odd integer that greater than 1?
這五個(gè)數(shù)是:2 6 8 14 16
a.none b.one c.two d.there e.four
我感受這道題除了2不成能,其它四個(gè)數(shù)都有可能.可謎底是c,想問(wèn)巨匠為什么?
問(wèn)題問(wèn)題意思是這5個(gè)數(shù)哪些可所以2個(gè)>1的數(shù)的積,一個(gè)是奇數(shù),一個(gè)是整數(shù),只有6和14的因數(shù)中有奇數(shù),所以C.
10 這是一道圖表題.
what was the approximate percent increase in personal income from 1965 to 1970?
是這樣(1970-1965)/1965仍是(1970-1965)/1970這樣?
是這樣:(1970-1965)/1965
