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

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

The centre of the third figure is empty. What digit should fit inside?

Keyboard words are not in alphabetical order, Why?

Can you find the missing piece of the Porsche?

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

Identify the 10 differences between the two given pictures.

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.