I am white when I am dirty, and black when I am clean. What am I?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Can you count the number of blocks in the picture below?

Can you decipher the two rows to find the hidden word?

What is next number in the pattern below:

131 517 192 123 ?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?