When my father was 31 I was 8. Now he is twice as old as me. How old am I?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

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?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What goes up but never comes down?

What is the next number in this matchsticks series riddle?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Can you Find and name the hidden bird in the picture below ?