A is 40 % more than B and B is 60% less than C. If C is 60 % more than D, then which of the following is true?

If A earns $$ {33{1\over 3} \%}$$  more than B, how much percent does B earn less than A?

The length and breadth of a rectangular field are in the ratio of 3 : 2 . If the perimeter of the field is 80 m, its breadth (in meters) is: 

Find the value of. 67²–33².

Find the value of   $$ {(0.75)^3\over1-.75}+[0.75+(0.75)^2+1]$$

If 28 men complete the $$ {7\over 8}$$ portion of a work in a week, then how many man will have to work to complete the remaining work in one finish.

If tan $$ -{7π\over4}=x $$ then the value of x is : 

If the height of a given cone be doubled and radius of base remains the same, the ratio of the volume of the given cone to that the second cone will be -