What work can one never finish?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

What came first, the chicken or the egg?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

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?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?