If 10 men or 20 boys can make 260 mats in 20 days, then how many mats will be made by 8 men and 4 boys in 20 days? 

If 10 men or 20 women or 40 children can do a piece of work in 7 days, then 5 men, 5 women and 5 children together can do half of the work in 

A alone would take 6 hours more to complete the job than if both A and B would work together. When B worked alone he took 1.5 hours more to complete the job and A and B worked together. How much time they will take if they if they work together?

A hostel has 120 students and food supplies are for 45 days. If 30 more students come to that hostel, then in how many days will the food items be finished there?

16 men can complete a piece of work in 7 days. In how many days will 28 men complete the same work?

P and Q together can do a job in 6 days. Q and R can finish the same job in 60/7 days. P started the work and worked for 3 days. Q and R continued for 6 days to finish the work. Then the difference of days in which R and P can complete the job alone is 

A daily-wages laborer was engaged for a certain number of days for ₹5,750; but being absent on some of those days he was paid only ₹ 5,000. What were his maximum possible daily wages?

A, B and C gets a total wage of Rs.3600 if they work together. A and B gets a total wage of Rs. 2800 if they work together and A alone gets Rs.1600. Find the efficiency ratio of A, B and C