GRE quant database oct 22nd
1. If an integer n>2 takes the form k! And this satisfies if and only if the product of the 'n' numbers in that factorial should be less than or equal to k.
Col A: n!/(n-1)!
Col B: n!-(n-1)!/(n-2)!
2. Given a table
| X | f |
|---|---|
| 0 | n |
| 1 | 100-n |
Col A: Value of n for mean to be greater than 0.5
Col B: 50
3. If S1 = 2 and if Sn =S(n-1)*1/2 then
Col A: S6
Col B: 2^14(S20)
4. A bar graph with number of students and marks obtained.
| Marks | No. of students |
|---|---|
| 40 | 3 |
| 60 | 4 |
| 70 | 14 |
| 80 | 8 |
| 90 | 11 |
If the total number of students is 40, then
Col A: Median of the data
Col B: Average of the data
(@ all: this is the appropriate question)
5. If 14% people have ovens and 27% have washing machines, then what is the range of the people having neither oven nor washing machines?
A. 0-14%
B. 27-41%
C. 59-73%
D. 73-86%
(Options were something like that)
6. For a line 'l', if x-intercept = y-intercept = 4, then
Col A: Slope of line 'l'
Col B: -1
7. If 2 < a < 6 < b < 10 & the arithmetic mean of 3, 6, 9, a, b is 6.2, then
Col A: 6 - a
Col B: b - 6
8. If there is a list of some numbers, whose mean is 10.8 and standard deviation is '0', then
Col A: Range of that list
Col B: 0
9. If 'x' is 130% of 'y', then 'y' is what percentage of x?
10. If the total amount is calculated, by multiplying the number of goods and the price of each good, then if the number of goods is decreased by 20%, by what percentage must the price should increase to compensate the decrease?
11. If xy =! 0 and y^-1 = 3x^-1, then which of the following is equivalent to it?
Options in terms of x & y were given
(To the given options, examiners answer: y = x/3)
12. If 0 < x < y < z, then
Col A: x/y
Col B: y/z
13. If b = -8 & (a+b)^2 = 36, then
Col A: a
Col B: 14
14. In 1990, the wages of the employees in a company is 'x'. If from 1990-1995, the increment of wages is 15% and from 1990-2000 the increment is 30% then
Col A: Percentage increment form 1995-2000
Col B: 15%
15. How many number of even squares are their between 60 and 625.
A. one
B. Two
& so on..
16.
If x < y, then
Col A: Area of the triangle ABC
Col B: Area of the triangle PQR
