Two things were sold at same sale-price. One thing got 10% profit and another suffered 10% loss. The difference of their purchase price will be in multiple of which number.Tell_____. 

A works twice as fast as B and B works twice as fast as C. All three working together can finish a task in 4 days with the help of D. If D alone can finish the same task in 16 days, then in how many days will A alone finish 75 % of the same task?

Find the difference between compound interest and simple interest on 5000 for 2 years at 8% p.a payable annually.

How many pairs of twin primes are there between the integers 1 to 100? 

What is the total CSA of cone whose radius is 3 cm and height is 4 cm? 

The line graph shows the number of vacancies of accountants in a certain company. Study the diagram and answer the following questions.

What is the different between maximum and minimum vacancies?

A and  B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in-

8 men working for 9 hours a day complete a piece of work in 20 days. In how many days can 7 men working for 10 hours a day complete the same piece of work?