A circle circumscribes a rectangle with sides 16 cm and 12 cm. What is the area of the circle?

Direction: What value will come in place of the question mark (?) in the following question?

33, 42, 67, 116, 197, ?

If the length of the diagonal AC of a square ABCD is 5.2 cm, then the area of the square is?

If  $$n+{2\over 3}n+{1\over2}n+{1\over7}n=97$$ then the value of n is : 

The average of 11 numbers is 7. If each number is doubled, what will be the new average of the numbers?

Directions : The bar graph, given here, shows the demand and production of colour televisions of five companies for Diwali season in the year 2009. Study the graph carefully and answer the questions based on the graph.

The ratio of the demand and production of colour televisions of company E is : 

A shopkeeper charges his customers 15% above the cost price, if a customer has bought a sofa-set for 9039, then for how much did the shopkeeper buy it?

A can do 2% of a work in 4 days, B can do $$33{1\over 3}\%$$ of the same work in 10 days. They worked together for 9 days. C completed the remaining work in 6 days. B and C together will complete 75% of the same work in :