ORKUT QUANT DATABASE (Till Jan 7th)

1. If -8 < = x < = 10 & x + y = 4, then find the least possible value of xy?

2. Given that there are two concentric circles, if the radius of larger one is 3 more than the smaller one then find difference in their circumference?

3. Given that a Train A is traveling on a straight track at a constant speed of 90km/hr & train B is traveling on a straight track at a constant speed of 50km/hr
Col a: distance traveled by train A
Col b: distance traveled by train B

4. Given a function f which is defined for each positive three digit integer 'n' as f(n) = (2^x)*(3^y)*(5^z), where x, y and z are hundreds, tens and units digits of n, respectively. If m and v are three-digit positive integers such that f(m) = 9f(v), then what is the value of m - v?
A. 8
B. 20
C. 19
& so on.......

5. Given |x| = |y| & xy < 0
Col a : x+y
Col b : 0

6. When 'n' is divided by 7 remainder is 3, then what is the remainder when (2n-1) is divided by 7.( 'n' is a positive integer)

7. If 2.8! + 10! = (n)*8!, then what is the value of n