The length of the diagonal and the breadth of a rectangle is 13 cm and 5 cm respectively. Calculate its area (in cm²).

The bar graph shows the number of passports issued in a country in 6 consecutive years.

What is the average number of passports issued per year?

The ratio of the income of A to that of B is 5 : 7. A and B save Rs.4,000 and Rs.5,000 respectively. If the expenditure of A is equal to $$ {66 {2\over 3}}{\%}$$ of the expenditure of B, then the total income of A and B is:

An article is sold Rs.680 after two successive discounts of 20% and x% on its marked price. The marked price of the article is Rs.1000. What is the value of x?

Find the area of a quadrilateral whose diagonal is 10 cm. And the length of the length put on it is 6 cm and 5 cm respectively. 

A sum of money becomes eight times of itself in 3 years at compound interest. The rate of interest per annum is 

If the height and the radius of the base of a cone are both doubled, the volume of the cone becomes _______ of its previous volume.

The ratio of circumradius and hypotenuse a right-angled triangle is