Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Can you spot the man between the coffee bean in the picture below ?

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?

Solve the following series:
AZ, GT, MN, __, YB

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

I shave every day, but my beard stays the same. What am I?