Re: [計量] 請板友們幫幫我吧?我有數學題不會算!?

看板GRE (GRE入學考試)作者shenglan (拼了!GRE)時間16年前 (2010/05/12 11:14)推噓1(1推 0噓 3→)

留言4則, 2人參與討論串5/6 (看更多)

※ 引述《keikoYAMADA (KathyKurious)》之銘言： : ※ 引述《shenglan (拼了!GRE)》之銘言： : : 我今天剛把整本算完 : : 有很多題都搞不太懂意思 : : 請大家幫幫我吧?^^ : : 1.which of the following CANNOT be expressed as the sum of the squares : : of two integers? : : a)13 b)17 c)21 d)29 e)34 : : 2.if the value of the expression below is to be halved by doubling exactly : : one of the five numbers a,b,c,d,or e,which should be doubled? : : a)a b)b c)c d)d e)e : : expression---> a+b/c : : _______ : : d/e : : 3.the rectanglular rug covers half of a rectangular floor that is 9 feet wide : : and 12 feet long.if the dimensions of the rug are in the same ratio as those : : of the floor,how many feet long is the rug? : : a)6 b)21/2 c)2根號7 d)6根號2 e)4根號6 : 一個長方形墊子可以蓋住一個9x12長方形地板的1/2面積 : 如果墊子的長寬比跟地板一樣 : 墊子的長度是多少？ : 我算的答案是6根號2 : :) 恩~答案是6根號2 可是我自己嘗試畫圖了還是想不出來>< 六根號二到底是怎麼出來的阿!! : : 4.if $4,500 was invested in a bond fund when the price per share was $9 and : : $3,000 was invested in the fund when the price per share was $10,what was : : the average(arithmetic mean)price per share purchased? : : a)$9.625 b)$9.50 c)$9.40 d)$9.375 e)$9,20 : : 5.how many of the positive integers less than 25 are 2 less an integer : : multiple of 4? : : a)two b)three c)four) d)five e)six : : 6.one month Mary used 1/6 of her monthly salary for a car payment and 1/4 more : : than the car payment for rent.what fraction of her monthly salary did Mary : : use that month for the car payment and rent combined? : : a)5/24 b)3/8 c)5/12 d)1/2 e)7/12 : : 7.a secretary typed 6 letters,each of which had either 1 or 2 pages.if the : : 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 : : 8.a train travels 60 miles per hour for 3 hours and then 45 mile per hour : : for 2 hours.what is the train's average speed in mile per hour during the : : 5-hour period?(我最討厭速率題了，我每次都搞不懂觀念，所以遇到類似題都不會><") : : a)55 b)54 c)52.5 d)51 e)50 : : 9.if 4x is 9 greater than the sum of x and 3y,then x is how much greater than y? : : a)3 b)6 c)9 d)12 e)15 : : 10.a certain form letter is to be sent prospective customers.if 4 model-x : : computers working independently can do a combined total of 4 of the letters : : in 4 minutesmthen 100 model-x computers working independly can do a combined : : total of 100 of the letters in exactly how many minutes?(為什麼還是4分鐘?) : : a)4mins b)10mins c)25mins d)40mins e)100mins : : **拜託!請大家幫幫我了><" : : 我後面還有好多題要問 : : 這個月25號就要考了 : : 我很緊張阿!!! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 71.167.82.155