5 Pirates and 100 Gold Coins: There are 5 pirates (in strict order of seniority A, B, C, D and E) who found 100 gold coins. They must decide how to distribute them.

Rat and Poison Puzzle 1: You have 1000 wine bottles, one of which is poisoned. You want to determine which bottle is poisoned by feeding the wine to the rats. The poisoned wine takes one hour to work. How many rats are necessary to find the poisoned bottle in one hour?