If a hen and a half lay an egg and a half in a day and a half, how many hens does it take to lay six eggs in six days?
Solution
If 1.5 hens lay 1.5 eggs in 1.5 days (or 36 hours) then: 1 hen lays 1 egg in 1,5 days or 4 eggs in six days thus 1.5 hens lay 6 eggs in 6 days