In an office, there are 108 tables and 132 chairs. If of the tables and of the chairs are broken. How many people can work in the office if each person requires one table and one chair? 

A sum of money becomes 4 times at simple interest in 10 years. What is the rate of interest?

In what time will the simple interest be 2/5 of the principal at 8 percent per annum? 

Of the three numbers, the ratio of the first and the second is 8 : 9 and that of the second and third is 3 : 4. If the product of the first and third number is 2400. then the second number is: 

A sample of 50 litres of glycerine is found to be adulterated to the extent of 20 % . How much pure glycerine should be added to it so as to bring down the percentage of impurity to 5 %? 

A job can be completed by 12 men in 12 days. How many extra days will be needed to complete the job if 6. men leave after working for 6 days? 

The average age of 12 players of a team is 25 years. If the captain's age is included, the average age increases by 1 year. The age of the captain is: 

A long-distance runner runs laps of a 400 mt. track every day. His timings (in min.) for four consecutive days are 88, 96, 89 and 87 respectively, on average. How many meters/minute does the runner cover?