Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Henry has been caught stealing cattle and is brought into town for justice. The judge is his ex-wife Gretchen, who wants to show him some sympathy, but the law calls for two shots to be taken at Henry from close range. To make things a little better for Henry, Gretchen tells him she will place two bullets into a six-chambered revolver in successive order. She will spin the chamber, close it, and take one shot. If Henry is still alive, she will then either take another shot, or spin the chamber again before shooting.

Henry is a bit incredulous that his ex-wife would carry out the punishment, and a bit sad that she was always such a rule follower. He steels himself as Gretchen loads the chambers, spins the revolver, and pulls the trigger. Whew! It was blank. Then Gretchen asks, 'Do you want me to pull the trigger again, or should I spin the chamber a second time before pulling the trigger?'

What should Henry choose?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

What runs around the whole yard without moving?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

In the picture given below, can you find out which digit will take place of the question mark?