What is the largest integer that is a divisor of (n +1) (n+3) (n+5) (n+7) (n+9) for all positive even integers n? 

1) 3
2) 5 
3) 11
4) 15 

If p = x + 1/x  then the value of p – 1/p  will be -

(1) 3x 
(2) 3 / x
(3)  
(4)  

If a < b < c < d < e are consecutive positive integers, such that b + c+ d is a perfect square and a + b + c + d + e is a perfect cube. What is the smallest possible value of c?

1) 675
2) 576
3) 475
4) 384 

What is the smallest number which when increased by 5 is completely divisible by 8, 11 and 24? . 

1) 259
2) 355
3) 255
4) none

The absolute value of an integer x is represented by :

1) [x]
2) {x} 
3) (x)
4) | x |