Why is Saturday stronger than Monday?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Find the hidden tiger in the given optical illusion ?

Can you find out the total number of triangles in the given figure?

John was drowned by he was not wet. How?

In the four images below, can you find the odd one out?

Why is a river so rich ?

What is the word or phrase?