DATABASE (Till Dec 30th) ......फ्रॉम ahmd

1. From a set of positive numbers 1 to 100, two numbers x & y are to be selected at random.
Col A: Probability that the two numbers x & y are even
Col B: Probability that the sum of two numbers selected is even

2. If n is a multiple of 35, then
Col A: Number of prime factors of n
Col B: 4

3. The two legs of a right angle triangle are in the ratio 3 is to 1. If the length of the hypotenuse is sqrt(40), then find the perimeter of the triangle?
A. 14 to 15
B. 13 to 14
C. 12 to 13
D. 11 to 12
E. 10 to 11

4. The relationship between a and b is defined as
a @ b = a/b - b/a, then
l. For a=! 0, a@a = 0
ll. For b=! 0, b@1/b = 1
lll. For (a*b) =! 0, a @ b = -(b @ a)
A. I
B. ll
C. l & ll
D. ll & lll
E. l & lll

5. If x < y < 0, then
Col A: xy
Col B: y - x

6. Given that P1, P2, P3 work together to complete a work in 4hrs. If P1 & P2 can complete the work in 6days, then P3 alone can complete the work in how many days?
(Something like this)

7. If x^2 - x > 0 and lxl < 1, then
Col A: lxl
Col B: x

8. Given that a telephone exchange has numbers from 3000 to 3799 group. If Group1 contains numbers starting with 33 and 34 and if manager numbers of the Group1 end with either 0 or 1, then find the percentage of managers present in the company?
A. 6%
B. 7%
C. 5%
D. 8%
E. 9%

9. Col A: 2^-1 + 3^-1 + 4^-1
Col B: 1^-1

10. If 8k - 5m = 15 & 2k + m = 15, then
Col A: k
Col B: m