Can you find the thief by just looking at the picture below?

How many triangles are there on the puzzle below?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

Move three sticks of the spiral below to form a square.

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

What goes up but never comes down?

What does this Rebus Picture mean?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?