At a nice sun shiny day, a man rowed with his boat to an island in the middle of a big lake. On the island he caught some fish. Then he decides to return with his rowing boat. After 10 meters of rowing he looks behind him, but to his big surprise there is no island anymore. What happend to the island?

Sue has six pairs of white gloves and six pairs of pink gloves in her drawer. In complete darkness, how many gloves should she at least take from the drawer in order to be sure to get a pair that match?

Tim owns a pocket knife with five different tools. It has a corkscrew, a bottle opener, tweezers, a screwdriver and something else. What?