Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

Using eight eights and addition only, can you make 1000?

Why is the Hole below a Lock?

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

What always comes into a house through the keyhole?

There are a hundred statements.

First person says: At least one of the statements is false.

Second person says: At least two of the statements is false.

Third person says: At least three of the statements are false.

Fourth person says: At least four of the statements are false.

..

..

..

Hundredth person says: At least a hundred of the statements are false.

Analysing it, how many statements do you think are false and how many are true?

What goes up but never comes down?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.