No one wants to have it, but if one got it, he does not want to lose it. What is It?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10