What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Where do fish keep their money?

Take one out and scratch my head, I am now black but once was red. What am I?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

You can see it everyday, But cannot touch it at will. What is it?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.