In a certain time, the ratio of a certain principle and interest obtained from it are in the ratio 10 : 3 at 10 % interest per annum. The number of years for which the money was invested is? 

Directions: The line graph shows the number of work visas issued by a country in each year from 2011 to 2016. Study the diagram and answer the following questions . 

Number of work visas issued in 2016 were lower than the previous year by ? 

Aman and Ajay can build a wall in 9 days and 12 days respectively. In how many days can they finish the work if they work together?

The difference between two whole numbers is 110 and the numbers are in ratio 2 : 7. Find the sum of the two numbers.

If the 5-digit number 535ab is divisible by 3, 7 and 11, then what is the value of (a² - b² + ab)?

A and B invested 1/2 and 1/3 of the total capital respectively, the remaining part C invested. If there is a profit of Rs. 9696 at the end of the year, then what is the profit of B?

If the volumes of two cubes are in the ratio 27 : 64 and then the ratio of their total surface area is 

ABCD is a rhombus whose one angle is 60°.Find the ratio of the lengths of its diagonal?