[計量] 請問幾題陳向東數學
今天做陳向東數學後面的"考前衝刺過關120題"遇到一些問題~
20.What is the maximum number of cubes with sides of a length that could
fit inside a cube with sides of length 2s?
(A) 8 (B) 16 (C) 32 (D) 64 (E)128
Ans:D
看不懂題義...不懂最後的2s @@
29.Which of the following fractions expressed in the form P/Q is most
nearly approximated by the decimal. PQ, where P is the tenths' digit
and Q is the hundredths' digit?
(A) 1/8 (B) 2/9 (C) 3/4 (D) 4/5 (E) 8/9
Ans:E
一開始我以為P是P*Q的十位數 Q是百位數 但是沒有兩個digit相乘會破百
所以我後來又試了P是P/Q的十分位數 Q是百分位數
式子會變這樣 P/Q = (10P+Q)/100
可是也是有問題...100P=10PQ + Q^2 要合一定要Q為零 到最後搞成兩個都零
不好意思 英文太差 解不出來~希望能得到幫助!!謝謝
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※ 編輯: qazru 來自: 125.227.90.19 (06/07 16:38)
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