The number obtained by adding 12 to a natural number is 160 times of the multiplicative inverse of the natural number. Find the number.

1) 20
2) 16
3) 12
4) 8

If   , then the value of x² + 2x + 3 is:

(1) 3 
(2) 0 
(3) 4 
(d) 1

If an integer a is less than integer b, then :

1) a lies on the right of b on the number line
2) b lies on the right of a on the number line
3) a lies on the left of b on the number line
4) Both (2) & (3)

If 2 is a root of the equation x² + bx + 12 = 0 and the equation x²  + bx + q = 0 has equal roots, then q = 

(1)  8  
(2)  – 8
(3)  16
(4)  – 16 

 

If x, y, z are positive real numbers and a, b, c are rational numbers, then the value of    is :

(1)  –1  
(2)  0 
(3)  1 
(4)  none of these