A man, a woman and a boy can do a piece of work in 6, 9 and 18 days respectively. How many boys must assist one man and…

A group of 12 men can do a piece of work in 14 days and other group of 12 women can do the same work in 21 days. They be…

X, Y and Z complete a work in 6 days. X or Y alone can do the same work in 16 days. In how many days Z alone can finish …

A, B and C can complete a piece of work in 10, 12 and 15 days respectively. A left the work 5 days before the work was c…

Janardan completes $$\frac{2}{3}$$ of his work in 10 days. Time he will take to complete of the same $$\frac{3}{5}$$ wo…

Amit, Bhawana and Chandan can do a piece of work, working together in one day only. Amit is 5 times efficient than Bhawn…

A can do three times the work done by B in one day. They together finish $$\frac{2}{5}$$ of the work in 9 days. The num…

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…