Rajpal is a resident of 21st floor from the top and 9th from the ground (which is counted as floor no. 1) of a building.…

If the income of A is 10% more than of B and the income of B is 20% less than that of C, then the incomes of A, B and C …

Which nation launched civil service examinations first? 

Unit rate is only for  

Who is the father of blood group? 

What should come in place of the question mark in the following number series?0,6,24,60,120,210  ? 

Choose the alternative which is closely resembles the water-image of the given combination. 

Which of the following metamorphic rocks has the most weather resisting characteristics?