Solve the following problem:

Amin has 12 pieces of Tk. 10 and Tk. 5 notes in his wallet. If the total value of all the notes is less than Tk. 95, what is the maximum number of Tk. 10 notes that he has?

A, B and C enter into partnership. A invests 3 times as much as B invests and B invests two- third of what C invests. At the end of the year, the profit earned is Tk. 6,600. What is the share of B?

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 how many days?

The percentage profit earned by selling an article for Tk. 1,920 is equal to the percentage loss incurred by selling the same article for Tk. 1,280. At what price should the article be sold to make 25% profit?

What will be the deposited amount at initial stage, if it became to Tk. 33,500 at the end of 5 years, with a simple interest rate of 13.5% per annual? How many years is will take to become Tk. 40,600 of the same deposited amount?