What is full of holes but still holds water?

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?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Find the value of "?" in the ball picture Riddle below:

What does this rebus picture identify?

What does does this rebus picture means ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?