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

What Deficiency does the below rebus represent?

VIT_MIN

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

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

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?

Which is heavier: a ton of bricks or a ton of feathers?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?