By selling 90 chocolates for Rs. 160, a chocolate trader loses 20%. How many chocolates should he sell for Rs. 96 to make a profit of 20%?

The ratio of ages of Jai and Joy is 5:2. The sum of their ages is 63. After 9 years what will be the ratio of their ages?

Find the cost in rupees for carpeting a room 65dm× 30 dm at Rs. 45 per sq.m

What is the smallest number of 5 digits which is exactly divisible by 12, 24, 48, 60 and 96?

A wire is in the shape of a rectangle. Its length is 42.7m and breadth is 21.8m. If the same wire is re-bent in the shape of a square, what will be the measure of the side of the square?

If $$ {y={2x-1\over x+3}}$$ find x when y=1

 If $$ {x=7-4\sqrt{3}}$$ find the value of $$ {\sqrt{x}+{1\over {\sqrt{x}}}}$$.

The distance between two points A and B is covered in $$ {5{1\over 2}\ hours}$$ at a speed of 50 km/hr. If the speed in increased by 5km/hr, how much time would be saved?