Re: [計量] 最後的印度數量提問!

看板GRE (GRE入學考試)作者eadanlin (=口=)時間17年前 (2009/06/01 20:13)推噓0(0推 0噓 0→)

留言0則, 0人參與討論串2/4 (看更多)

※ 引述《KRZYSZ (VICTORIA)》之銘言： : 又要麻煩大家了! : Given a big square, in which 16 small squares were inscribed. The small ones : which had only 1 side covered with perimeter of big square was shaded. If n : is the number of such small shaded squares in a big square(n>4), then find : the actual number of small squares within a big square? : A. 4(n-4) : B. 4(n-2) : C. 2(n-4) : D. 2(n-2) : & so on...... : (something like this) : Ans: A : 這題我沒算出、雖然有劃出16個大小不全相同的小正方形， : 但從我畫出的圖去算n和共有多少個小正方形的答案卻不在選項中 : Given a ladder of length 5mts and it is displaced i.e slanted downwards, such : that it falls 'x' mts in height and horizontal length increases by 'y' mts. : Col A: x : Col B: y : Ans: B : 說一樓梯原貼著牆，後滑出去了，問降低的高度與底部滑出的長度 : 可以告訴我以數學式子解釋為何？我覺得是D也請問答案的來源是? : A regular hexagon ABCDEFG is inscribed in a circle. If BE is the diameter of : the circle, then : Col A: Length of BE : Col B: Length of BCD : Ans: C : 題目錯了？六邊形ABCDEF 沒有G點答案是C應該沒錯如果regular hexagon的意思是正六邊形的話畫圖便知 : There are some toys and some crates and when these toys are equally : distributed in the crates none are left. If there are 3 less crates, then : each crate consists of 12 toys with 27 toys left. Find how many toys were : there? : 是無數解嗎？　=> 12(x-3)+27 # of toys= t # of crates= c t=c*n = (c-3)*12+27 = 12c-9 ,c>3 => n=12-9/c 所以 c=9 n=11 t=99 : If N = 5^9 + 7^10, then : Col A: What is the least factor of 'N' greater than 1 : Col B: 3 : 答案是Ａ嗎？ N=odd+odd= even 可被2整除 Ans:B 萬年OP問題XD : There are 28 men in a room in that 14 men are selected out of which 7 are : under 50years : Col A: Percentage of men under 50 : Col B: 40% : 題意是28人中挑14人，而這14人中有7人under 50years？　沒錯所以A最大(14+7)/28=75% A最小7/28=25% Ans:D : The students were given two sets of questions; they can mark either yes/ no : or can leave it as unanswered. If 1000 people were asked, for first question : if : 400 answered YES : 340 answered NO & : 260 left unanswered and for second question, if : 450 answered YES : 310 answered NO & : 240 left unanswered, : then, find the minimum number of people who gave unanswered option for both : questions? : 我認為是零，但我沒有答案，所以想請問大家的答案。對+1 : Given two circles of equal size and the distance between their centers is 12. : If the two circles coincide each other & distance between their edges is 4, : then find the area of any one of the circle? : 既然兩相同圓重疊，又哪來的凌edge（找不到那個菱的字…..）? : Given a function f which is defined for each positive three digit integer 'n' : as f(n) = (2^x)*(3^y)*(5^z), where x, y and z are hundreds, tens and units : digits of n, respectively. If m and v are three-digit positive integers such : that f(m) = 9f(v), then what is the value of m - v? : A. 8 : B. 20 : C. 19 : & so on....... : 從f(m) = 9f(v)去看(2^x)*(3^y)*(5^z)來求m, v 可是在設完Xv,Yv,Zv,Xm,Ym,Zm我還是 : 沒找出上面方程式提供的線索 : What is the value of 10^2 - (1/10^4) + 2^4 - (1/2^4)? : 請問這題有甚麼撇步比較快求解? : 我沒看出有甚麼特殊結 9=3^2 所以v的十位數比m的十位數少2 Ans:B -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.113.201.201