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

(1) 3x 
(2) 3 / x
(3)  
(4)  

Sum of the roots of the equation x⁴ - 3(2^{x + 3}) + 128 = 0, is:

(1) 0 
(2) 7
(3) 5 
(4) 8

If 3 is the least prime factor of number a and 7 is the least prime factor of number b, then the least prime factor of a + b is :

(1)  2  
(2)  3
(3)  5
(4)  10

The rational form of –25.6875 is :-
1)-(411/16)
2)-(421/16)
3)-(431/16)
4)-(441/16)

Four positive integers sum to 125. If the first of these numbers is increased by 4, the second is decreased by 4, the third is multiplied by 4 and the fourth is divided by 4, we find four equal numbers, then four original integers are: 

1) 16, 24, 25, 80
2) 8, 22, 38, 57 
3) 7, 19, 46, 53
4) 12, 28, 40, 45