If 999x + 888y = 1332 and 888 x + 999y = 555.then the value of (x + y) is-

A and B together can do a certain work in x days. Working alone, A and B can do the same work in (x+8) and (x+18) days, respectively. A and B together will complete $$ {5\over 6}$$ of the same work in;

A sum of money becomes 3 times in 12 years. In how many years it will become 5 times at the same rate of simple interest?

36 people working 8 hours a day can do 3 units of work in 12 days. How many persons are required to do 5 units of that work in 16 days. If they work for 6 hours a day?

A bag contains three types of coins 1 rupee-coins, 50p-coins and 25 p-coins totaling 175 coins. If the total value of the coins of each kind be the same the total amount in the beg is: 

A shopkeeper marks an article 24% above its cost price and allows a 15% discount on the marked price. If he earns a profit of Rs. 27 by selling the article, then the selling price of the article is:

Study the given graph carefully to answer the questions that follow:

What is the total number of days that carpenter Z will take to make one piece each of all the four items together?

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