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

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

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

What is wrong in the below Picture?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

How can you tell a raw egg from a hard-boiled egg?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Can you solve the maths in the below-given picture equation?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?