What has many keys but can’t open a single lock?

What you cannot hold but it is yours?

What has to be broken before you can use it?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

What is the word or phrase below?
R | E | A | D

Imagine you are in a room with no windows or doors. How will you get out?

Can you find out the remainder when 3^300 is divided by 5?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Identify the hidden meaning behind this picture?