A ring.

"Are you asleep yet?"

All months

He goes up to one guard and asks " If I ask the other guard which door leads too freedom, what will he say?" he then goes into the opposite door.
So if he asks the lying guard the guard, the guard would say the prison door, because he lies. But if he asks the truthful guard, knowing his companion would lie, points to the prison door.

The fish bowl got knocked over. The bodies were goldfish.

Mt. Everest; it just wasn ‘t discovered yet.

The dead man and his two friends (three people) were flying in a hot air balloon. They were heading down wards and towards the cliff. They threw everything out of the hot air balloon and stripped to their underwear, but it wasn't enough. They decided to draw straws to see who would have to jump out. That poor man lost and had to jump out. His friends floated away to safety.

They dyed their hair.

The ten statements all contradict each other. Therefore, there can be at most one statement true. Now suppose there is no statement true. That would mean that statement 10 indeed would be true, which results in a contradiction. This means that exactly nine statements must be untrue, and thus only statement 9 is true.

just three words

My mom gave me a small brother, are two differents brothers.

Option D

8278 : 1510 : 25 8 + 7 = 15; 2 + 8 = 10 ----> 1510 1 + 1 = 2 ; 5 + 0 = 5 ----> 25