What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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

When did John make this statement?

Using Only Five 5's and any mathematical operator make sum as 37

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

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

Who is He ?

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

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

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?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?