GRE數(shù)學(xué)考試中易錯(cuò)題匯總
    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
    1.三條任意直線，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英尺中有多少個(gè)1/4英尺，應(yīng)該是16個(gè)，所以是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表示a平方，a3表示a立方
    7新定義的運(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
    答案是D，題目我都看不懂，是啥意思呢?
    這是說(shuō)秘書(shū)打六封信，沒(méi)一封信要1頁(yè)或者兩頁(yè)。如果秘書(shū)總共打了10頁(yè)，那么有多少封信是兩頁(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
    我覺(jué)得這道題除了2不可能,其它四個(gè)數(shù)都有可能.可答案是c,想問(wèn)大家為什么?
    題目意思是這5個(gè)數(shù)哪些可以是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 這句話大家看該怎樣列式子呢?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還是(1970-1965)/1970這樣?
    是這樣:(1970-1965)/1965