Solution:

10 + 10 = 20
11 + 11 = 22 or we can say 20 too.

Solution:

What

It stated 'WHAT' was the father's name.

Solution:

Rooney eats the 'dates' on the calendar,gets water from the waterbed , and uses the piano key to escape :-)

Solution:

1

As stated
1=6 => 6=1

Solution:

4100

some people might guess 5000

Solution:

H202 (Hydrogen peroxide) which is harmful and can cause death.

Solution:

It's simple, they are playing monopoly.

Solution:

Trojan evidently was the one buried.

Solution:

Did you concentrate on the point that it was a ping pong ball? Also that you have a water bottle with you. We never mentioned that it was empty. So what you will do is simply empty it in the narrow pipe and the ball will come up floating on the water. All the other things that were mentioned served just as distractions and if you were not able to find a way, they all worked quite well.

Solution:

Well, this is possible. They were playing as a team in doubles match against other team.