If pq (p+q) = 1, Then the value of 1/p3q3 -p3-q3 is equal to
If x2 + 1/x2 = 2, then the value of x - 1/x is
The price of an article is decreased by 10%. To restore it to its former value, the new price must be increased by :
A T.V was sold at a profit of 5% If it had been sold at a profit of 10% , the profit would have been Rs. 1000 more. What is its cost price
The average monthly salary of 19 members of a group is Rs. 16000. If one more members whose monthly salary is Rs. 20000 has joined the group, then the average salary of the group is
A profit of Rs. 960 is divided between A and B in the ratio 1/3:1/2. The difference of their profit is :