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?

Can you tell a 3D object that has just two surfaces?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?