[計量] 10/19~10/21印度數學問題

看板GRE作者calka (^^)時間13年前 (2010/10/23 07:28)推噓3(3推 0噓 21→)

留言24則, 6人參與討論串1/1

這些是不會算的，有些是算了跟他答案不同，麻煩大家幫我看一下謝謝!!! 10/19印度數學 http://www.drrajus.com/forum/viewtopic.php?t=7904 1. (有圖)Given a figure of a square like above. Col A: y° Col B: 90° - x° 我算B 他答案有人寫C和B 2. Given that y ? x and 0 ? x ? 8. Find the number of ordered pairs (x, y) possible? 條件不齊???所以是D 4. Given a cylinder, if the sum of base circular area and top circular area of the cylinder is equal to the lateral surface area of the cylinder, then which of the following is true? A. r = h B. r = 2h C. 2r = h & so on……… 答案是A 5. Given that there are 5 points in a plane which are not collinear. Col A: Number of straight lines that can be formed using any two points Col B: Number of triangles that can be formed using any three points 答案是C，我不知道怎麼解? 8. If (2/3)*(x) = 8 + (1/3)*(x), then what is the value of (1/2)*(x)? 答案是12，不知道怎麼算的? 10/20印度數學 http://www.drrajus.com/forum/viewtopic.php?t=7908 4. Given that 0 < x < 1 Col A: 1/x Col B: x^2 5. Given that 0 < x < 1 Col A: x^(-2) Col B: x^3 (Similar to this) 這兩題我有算出都是A 可以有高手請教一下觀念嗎? 請問是當n>1的時候 1/n<1<n開根號3次方<n開根號2次方<n<n的2次方那當0<n<1 n的2次方<n<n開根號2次方<n開根號3次方<1<1/n 我這樣列有錯嗎?指教一下 6.(有圖) Col A: a + b Col B: 14 我算B ，答案是D? 10/21印度數學 http://www.drrajus.com/forum/viewtopic.php?t=7917 2. There are 5 points in a plane and no three points lie in the same line. Col A: Number of line segments having their ends on two of the points Col B: Number of triangles having their vertices on three of the points 答案是C，之前有這題。 4. Given that there are 6 green, 4 black and 3 red balls in a box. And if 3 balls are taken from it without replacement, then what is the probability that the selected balls are red? 這題不會 5. Given that x = y and z > w Col A: x - y Col B: w - z 我覺得是D答案是B? 6. Given that 1 BP = 1.5 USD 1 USD = 1.4 Canadian $ 1 Canadian $ = 1.3 German Mark Then, 50 BP is how many German Mark? 我算118.3 答案是136.5 German Mark 8. An employee was eligible for bonus in the following years 1997, 1998 and 1999. If the bonus for the year 1998 is 25% greater than that of the year 1997 and the bonus for the year 1999 is 20% less than that of the year 1999 then, Col A: Bonus for the year 1997 Col B: Bonus for the year 1999 題目是不是怪怪的???這句?the bonus for the year 1999 is 20% less than that of the year 1999 then, 11. Given f(x) = (-1 + 3(x))^2 + 4 Col A: The minimum possible value of the equation Col B: 4 不會算... 12. In a certain sequence of 1,2,3,4………..31 Col A: The arithmetic mean of the sequence Col B: 16 我算B答案是C.... 14. If an edge of a pyramid with a square base is 10 cm long then find the height of the pyramid from its tip to the centre? 這題好像就是之前那題，不過又好像不太一樣....不會算... 15. There are a certain number of ping pong balls in a sac and they are numbered from 1 to n where n is just above 50. Find the probability of NOT selecting an odd numbered ping pong ball from the sac in terms of n. 這題看不懂意思...不會算... 16. The two centers of identical circles are separated by a distance of 17 cm and the radius of one of the circle is 5 cm. Imagine two hypothetical points ‘p’ & ‘q’ one each on circumference of the two circles then find the maximum possible distance between p & q? 我不知道怎麼算出27... 17. If 2^132 is divided by 3, then Col A: Remainder Col B: 2 我算是C 答案是D... 18. Find the area enclosed by an arc of 135 degrees in a circle of radius 4 cm? 答案是6pi 19. Data Interpretation: Bar graph – Months (x-axis) Vs. Medians of money spent on buying houses (thousands of dollars) Mar - 120 April - 116 May - 121 Jun - 118 Jul - 123 Aug - 119 Sept - 122 Oct - 121 Nov - 117 Dec - 120 I. Find the ratio of maximum to minimum medians of money spent on buying houses? II. Find the arithmetic mean of differences of medians of money from Mar to Dec? II不會算...答案是32/9 21. Given that X drives 110 miles in 55 mph and Y drives 90 miles in 45 mph. Col A: Average speed of X Col B: Average speed of Y 答案是A 22. When (10)^22 +1 is divided by 11, the remainder is r. Col A: r Col B: 2 題目好像變形了，還是C，為什麼? 24. Given that ab > 0 and 0 < c < 1 Col A: (a/b)/c Col B: a/(b/c) 我覺得是D 答案是A... 25. If 2x + 3 = 6, then what is the value of (6x)^2 - 5x + 14? (Similar to this) 我算32-15/2 26. If there are 1 to n balls in a box. And ‘n’ is odd number greater than 50, then what is the possibility that the odd number ball is taken out from the box? (Similar to this) 這題不太懂，不會算 27. The right angle triangle has a hypotenuse of length 12 and one angle is 45°, then what is the area of the triangle? 我用公式帶(3根號/4)乘上144算出來是36根號3 答案是38，又跟我不一樣了... 不好意思這麼多問題，麻煩大家了謝謝~ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.18.136.117

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ron0908

10/23 08:22, , 1^F

10/23 08:22, 1^F

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