A man sells two chairs at Rs. 120 each and by doing so he gains 25% on one chair and loses 25% on the other. His loss on the whole in Rs.is

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

Which of the following represents a correct proportion?

A pilot in an aeroplane at an altitude of 200 m observes two points lying on either side of a river. If the angles of depression of the two points be 45 ° and 60 °, then the width of the river is 

If  $$ {x^{\sqrt{x}}}={({x{\sqrt{x}}})^{x}}$$, then the find the value of x

40 men can complete a piece of work in 40 days. They started the work together. But at the end of each 10th day, 5 men left the job. The work would have been completed in 

What would be the compound interest accrued on an amount of Rs.7850 at the rate of 14% per annum in two years?

The distance between the center of two equal circles each of radius 3 cm, is 10 cm. The length of a transverse common tangent is