A car travel to a place 150 km away at an average speed of 50 km/hr and returns it 30 km/hr. What is the average speed of the whole journey?

What is single discount equivalent to two successive discounts of 15% and 20%?

What is the greatest number which will divide 110 and 128 leaving a remainder 2 in each case?

A circle and a rectangle have the same perimeter. The sides of rectangle are 18 cm and 26 cm then find out the area of circle?

Study the following table carefully and answer the questions given below.

The total number of students in Agriculture in 2001 and 2005 together was approximately what percent of number of students from the same discipline in 2002?

If $$ \sqrt{0.04×0.4×a} =0.4×0.04×{\sqrt{b}}$$ then the value of $$ {a\over b}$$ is:

Study the graph carefully and answer the following questions.

How many state showing above average production in 1992-93 showed below average production in 1993-94 ?

What will come in place of question mark ( ? ) in the following series?
13, 25, 61, 121, 205, ?