Can you spot the hidden girl in the picture below?

I can write cow in 13 letters.

Can You?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Which wheel of car does not rotate when you turn your car right?

I don't get anymore wetter, no matter how much rain falls on me.

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?