Since there always has to be 1/5 of the number - 1 for the monkey, all numbers must be multiples of 5 *after* the 1st man takes one.
Since the monkey is like a 6th person, there needs to be 5 * 6 = 30 coconuts.
Each of the 4 men take 6 coconuts or 1/5 of 30.
The last man takes 2 coconuts, since the monkey took 4.

Answer #1| 28/12 2013 22:19