There were three creatures outside a building. One of the creatures did not move itself but entered the building and knew that it was in the building. The second creature moved itself, entered the building, and knew that it was in the building. The last creature did not move itself but entered the building, and the creature did not know that it was in the building. What are the three creatures?

The winner of the World Series is the first team to win four games, so the maximum number of games that could be played is 7. You want to place a $100 bet (even money) on your team to win the whole series. A bookie says he will not take bets on the whole series, but would be willing to let you bet on each individual game. Is there a betting strategy you could put in place to replicate your $100 bet?

Fred and Ethel go to the golf course. They meet 3 other couples there, and everybody gets introduced. After introductions, Fred asks everyone how many hands they shook. He gets seven different answers. Presume that no one shook their partner's hand

How many hands did Ethel shake?

What's the secret to the sequence? What's the next number?

4, 5, 9, 11, 12, 13, 14...

Once again, Madadia's insipid explorer, Wigan Smith is on the trail of lost treasure. He has come across a map showing that somewhere in the middle of the Chillivalley desert, there is the lost city of "Kebabylon". To reach it, he will have to travel overland by foot from the coast. On a trek like this, each person who goes on the journey can only carry enough rations for one person for five days and the farthest Wigan Smith and his group can ...

When the day before yesterday was referred to as the day after tomorrow, the day that was then called yesterday was as far away from the day we now call tomorrow as yesterday is from the day which we shall now be able to speak of last Monday as a week ago yesterday. What day is it?