When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What Adam and Eve do not have but the rest of the people have?

I can write cow in 13 letters.

Can You?

What has 88 keys?

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?