Re: [計量] 幾題數學
※ 引述《murai111 (明鏡止水)》之銘言：
: 1. If x, y, z, u, v, w, t are non-zero numbers then what are the possibilites
: for the terms not being zero if xyz = uvwt?
不太懂題目的意思欸
是說 x y z y u v w t 皆非零 則xyz = uvwt =\= 0的機率是多少?????
: 2. Perimeter of a parallelogram is given as 360
: Col A: length of diagnal
: Col B: some value like root 9 *27
^^^^^^^^^^ 是 squar root (9) * 27的意思嗎?
又 Col A 是算兩對角線和嗎?
: 2. If the speed of a vehicle is x/6 miles for 'y'secs
: then the speed for Z miles is?
: 沒給選項 是要用xyz來表達答案?
我想應該是 我有看過類似的題目是用符號表達答案
: 7. When x is divided by 12, it gives a remainder of 5.
: So what is the remainder if x^2 is divided by 9?
: 有特定答案嗎?
令x=12k+5. x^2=144k^2+120k+25
^^^^^^ ^^
餘0 餘7
當k=1 , 120k = 9t_1+3
k=2 , 120k = 9t_2+6
k=3 , 120k = 9t_3+0
thus, the possible candidates for the remainder of x^2 divided by 9 are
4, 7, 1
: 11. If there are 33 balls arranged in 7 boxes which of th following is true.
: (i) at laest one box has more than 5
: (ii) there are more than one boxes with 4
: (iii) there is atlest one box empty
: A. I only
: B. ii only
: C. i and ii
: D. i and iii
: 不太懂...
33球放入7箱的放法?!....我想應該是A吧
: 4. Given a table with some variables as ‘u’, ‘v’, ‘r’, ‘s’ & ‘t’
: whose product is even and also it is given that product of ‘uvrs’ & ‘uvr’
: as even and product of ‘rs’ as odd. Which of the following options
: cannot be odd?
: A. R
: B. s
: C. t
: D. u
: E. v
題目是不是打錯啊? 三個條件都沒有t耶
: 5. Given six variables arithmetic mean as 80 and given first 3 has an average of 60 then asked to find
: Col A: How many numbers of the last 3 numbers can be greater than 80
: Col B: 3
: 這題是說後三數中大於80會有幾個
: 當然1-3都有可能 在於can 所以應該是選D還是C?
我想應該是c吧
: 麻煩各位了...
: Q比V的壓力還大....XD
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