What work can one never finish?

Can you divide the below-given shape into four equal and identical pieces?

Why do you find that most of the buildings are deprived of the 13th floor?

What word is pronounced the same if you take away four of its five letters?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

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?

Solve this riddle by finding the odd one out from the rest.

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

Can you name some countries which do not have the alphabet 'A' in them?