What work can one never finish?

Can you solve the below geography rebus by decoding the below rebus ?

What does below chemistry rebus means?

What can go up a chimney down, but can’t go down a chimney up?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

Count the number of triangles in the picture below:

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

What's the only room from which no one can enter or leave

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?