If it take 4 men 8 days to do a piece of work, how long will it take 16 men to do it ? 59. How many men in 8 days can do a piece of work which will require 16 men 2 days to do ? 60. If one pine-apple is worth as much as 2 oranges, and oneanbsp;...
|Title||:||A Mental Arithmetic, on the Inductive Plan|