What kind of band never plays music?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

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?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Can you make a six-letter word using the letters N, A and B ?

Forwards I am heavy, backward I am not. What am I?

How many words can a pen with half refill write?

What begins with T, ends with T, and has T in it?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?