As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Count the number of triangles in the below picture?

You need to move three matchsticks to form three squares. Can you do it?

What always comes into a house through the keyhole?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

A sundial has the fewest moving parts of any timepiece. Which has the most?

John's five friends Rachel, Jacob, Phoebe, Joey and Chandler live on the same road.

Rachel lives in the house: A, Jacob lives in the house: B, Phoebe lives in the house: C, Joey lives in the house:D, Chandler lives in the house: E

Mathematically
B*C*D = 1260
B + C + D = 2E
2A = E

The road numbers run from 2 to 222.

Can you tell me the house number of each of John's friends?

What does this say?

XLR8

I have no life, but I can die. What am I?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?