One of my favourite puzzles of all times is a bit tough for a typical lower-school kid. It goes like this :
Five men and a monkey are stranded on a desert island. They spend the day searching for food, and by evening, they have collected a big pile of coconuts. Too tired to do anything but sleep, they agree to share the coconuts out in the morning.
However, one of the men wakes up just before midnight. He doesn’t trust his companions, so he goes to the pile of coconuts to take his share. he divides the coconuts into five equal piles, with one left over. He takes his share and hides it, gives the spare coconut to the monkey, collects the rest back into a pile, and goes back to sleep. Continue reading Coconuts and Diamonds