Amish Rai 
Practice time and work question – The average age of A and B is 20 years. If C replace A the average would be 19 and if C replaces B the average would be 21. What are the ages of A, B and C?
Practice time and work question – A and B can do a piece of work in 12 days, B and C can do it in 15 days and C and A can do the same work in 20 days. How long would each take to complete the job?
Practice time and work question – In boring a well 50 m deep, the cost is Rs.4/- for the first meter. The cost of each successive meter increases by Rs.2/-. What is the cost of boring the entire well?
Practice time and work question – A can do a piece of work in 9 days. B can do the same in 12 days. In how many days can the work be completed if A and B work together?
Practice time and work question – If A and B can do a piece of work in 10 days and A alone can do it in 15 days, how long will B take to do it?
Practice time and work question – If 5 men take an hour to dig a ditch, then how long should 12 men take a dig to ditch of the same type?
Practice time and work question – A man can complete a job in 12 days, his wife will complete in 15 days. How many days, working together they will finish the job?
Practice time and work question – Sixteen men can complete a work in twelve days. Twenty four children can complete the same work in 18 days. 12 men and 8 children started working and after eight days three more children joined them. How many days will they now take to complete the remaining work?
Practice time and work question – 12 men can complete a piece of work in 4 days, while 15 women can complete the same work in 4 days. 6 men start working on the job and after working for 2 days, all of them stopped working. How many women should be put on the job to complete the remaining work, if it is to be completed in 3 days.
Practice time and work question – A make a wall in 9 hour. B makes a wall in 10 hour. When doing together 10 more bricks are required and together make a wall in 5 hour. How many bricks are there in the wall?
Practice time and work question – A man and a woman, walking together start out by both taking a step with the left foot. In order to keep together, the man whose stride is longer, takes two steps while the woman takes three. How many steps will the woman have taken they are both about to step out on the right foot for the first time together?
Practice time and work question – A and B together can do a piece of work in 12 days and A alone can complete the work in 18 days. How long will B alone take to complete the job?
Practice time and work question – If a man earns Rs20 on first day and spends Rs15 on second day, and earns Rs20 on third day and spends Rs 15 on fourth day and goes on. On which day he will be having Rs 60.
Practice time and work question – There are 3 boys and 4 girls. How many ways they are arranged such that boys should be always together ?
Practice time and work question – If 8 men and 6 boys can dig a well in 2 days, and 6 men and 2 boys can do it in 3 days, how long will 5 men and 3 boys take to do it?