Re: [計量] 請教幾題計量
※ 引述《lego761207 (OneABC)》之銘言：
題目好眼熟，是上週的模考題目吧...XD
: 1.Item X costs twices as much as item Z, and item Y
: costs $3 more than half the cost of item Z.
: The cost of item X The cost of item Y
: Ans.D
X=2Z and Y=(1/2)Z+3
因為Z不知與3的大小關係，所以無法判斷X與Y的大小，故選D。
: 2.A rectangular textbook page measure 8(1/2) inches by
: 11 inches. The page is partitioned into rectangular spaces
: each 1/12 inch by 1/8 inch
: The number of such spaces 17*11*48
: on the textbook pages
: Ans. C
總數量=(總長/小格長)*(總寬/小格寬)
[(8.5)/(1/12)]*[11/(1/8)]
=(8.5)*12*11*8
=17*6*11*8
=17*11*48
左邊與右邊相同，故選C。
: 3.How many postive integers less than 20 are equal to
: the sum of a postive multiple of 3 and a postive
: multiple of 4
: A.Two
: B.Five
: C.Seven
: D.Ten
: E.Nineteen
: Ans.D
3的倍數(<20)：3,6,9,12,15,18 = 6個
4的倍數(<20)：4,8,12,16 = 4個
6個+4個 = 10個 ...故選D。
: 謝謝大家
不客氣 :)
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