Tricky riddles

It's 7:00 am. You are asleep and there is a sudden knock on the door. Behind the door are your parents, who came to have breakfast. In your fridge: bread, pasteurised milk, juice, and a jar of jam. What will you open first?

Tommy Tucker took two strings and tied two turtles to two tall trees. How many T’s in that?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place.

If a green man lives in a green house, a purple man lives in a purple house, a blue man lives in a blue house, a yellow man lives in a yellow house, a black man lives in a black house. Who lives in a White house?

What starts with a 't' ends with a 't' and is full of 't' ?

John Heysham Gibbon was most renowned surgeon of 1940-1970. More than 90% of his surgeries he performed are highly successful and still almost all of his patients die.

What kind of dog has a bark but no bite?

Can a man legally marry his widow's sister in the state of California?

There is bomb on top of a computer; around the computer are a hairbrush, keys, phone and a cup. When the explosion comes, what item destroyed first?

Imagine you are in a sinking rowboat surrounded by sharks. How would you survive?