The length of the diagonal of a square is ‘a’ cm. Which of the following represents the area of the square (in sq. cm.)?

Directions: The pie– chart shows the proposed outlay for different sectors during a Five–Year plan of Government of India. Total outlay is Rs. 40,000 crores. By reading the pie–chart answer the following three questions.

If the proposed outlay of Irrigation is x% of the proposed outlay of Agriculture, then x is equal to 

$$\left({?-0.5\over 0.2} \right)={120\over 2}$$

What should come in place of the question mark '?' in the following number series?

9, 19, 40, 83, ?, 345, 696

Direction: Read the following graph carefully and answer the following questions:
The following bar graph shows the quantity(in kg) of wheat, rice, pulses and salts sold by two companies P and Q in the month of January.

What is the difference between the quantity of salts sold by company P and Q together and the quantity of wheat sold by company P?

If   $$ a={b^2\over b-a} $$  then the value of a³ + b³ is 

The price of petrol is increased by 25%. By how much percent a car owner should reduce his consumption of petrol so that the expenditure on petrol would not be increased?

if $$m+{1\over(m-2)}=4$$,then find the value of  $$ (m-2)^2+ \left({{1\over {m-2}}} \right)^2 \ $$