If it took eight men ten hours to build a wall, how long would it take four men to build it?

What does this rebus means ?

PROG WORKRESS

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

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?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Count the number of lines in the image below ?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

What kind of storm is always in a rush?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?