1, 3, 5, 7, ………total average of 25^th number  is:

A train is moving at a speed of 80 km/ h and covers a certain distance in 4.5 hours. The speed of the train to cover the same distance in 4 hours is 

What least number must be subtracted from 1936 so that the resulting number when divided by 9, 10 and 15 will leave in each case the same remainder 7? 

The lengths of one side of a rhombus and one of the two diagonals are 6 cm each. Find the area of the rhombus (in cm²). 

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight (in kg) of B is 

A can give 40 meters start to B and 70 meters to C in a race of one kilometer how many meters start can B give to C in a race of one kilometer? 

The ratio of the areas of two circles is 16: 25. What will be the ratio of their circumferences?

What should be added to $$ {10 \ over 11} $$ to get the sum $$ {11 \ over 10} $$?