Which country gets ill every time?

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

When did John make this statement?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

How could a baby fall out of a twenty-story building onto the ground and live?

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.

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

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

O T T F F S S ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

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