印度2008年1月GRE考试机经(十)

ORKUT QUANT DATABASE (Till Jan7th)
1.        The average of seven numbers is 35 then when k is added to it then the average of those 8 is 35. What is the value of k?

2. If a number is divisible by 5 the remainder is 3 and when the same number is divided by 7 the remainder is 4. What is the least possible number?
Ans:18

3. A group of 1 proffessor and 3 students have to be made from 4 proffessor and 5 students.
Col a: Different ways in which the groups can be formed
Col b: 40
Ans: C

4. Given -14, -11, -7 , 9, 10,13.... is the series
I. Median is greater than mean
II. S.D is greater than range
III. Mean is greater than median
A.1 only
B. 1 and 2 only
C.1,2 an 3 only
D. None of these
中数median： a value in an ordered set of values below and above which there is an equal number of values or which is the arithmetic mean of the two middle values if there is no one middle number。即一个顺序排列数集的中间数，如果数序列为奇数，则中间的数为中数，如果数序列为偶数，则中间两数的平均数为中数。
平均数（Average or mean），指的是所有数的平均。
众数（mode），指的是数集中出现频率最高的数。
值域（range），指的是数集中最大数减最小数。即（min,max）

5. Col A: [(2+ sqrt(3)) / (2 - sqrt(3)]^3
Col B: (10^6 / 3^6)
Ans:A

6.There is a bag which contains ribbons of lengths 8m and 14m. If the total length of all threads is 100sq.m.
Col A: number of threads of length 8m
Col B: number of threads of length 14m
Ans: D

7. What is the percentage change of area of rectangle, when length is increased by 10% and width is decreased by 10%?

8. Given that a Square is inscribed in a circle and the diameter of circle is equal to diagonal of square and radius of the circle is also given and the question was asked to find the area of square?
Question is something similar to this......

9. Given a semicircle and there was a triangle inscribed in it, such that the base of triangle is same as diameter of circle.The other side of triangle was on the curve of a circle(it made 90 degree) and question was asked to compare the other angle with 45.
Question is something like this....