What is the riddle which can be asked all day with a different correct answer each time.

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

You need to arrange three 7 and mathematical symbols to form number 1?

How many words can a pen with half refill write?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

What goes up but never comes down?