6 men can complete a piece of work in 12 days. 8 women can complete the same piece of work in 18 days, whereas 18 children can complete the piece of work in 10 days.
4 men, 12 women and 20 children work together for 2 days. If only men were to complete there remaining work in 1 day, how many men would be required totally?
I am completely clueless. No idea how to think through this problem.