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

Count the squares in the matchstick puzzle below?

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?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

What is black when you buy it, red when you use it, and gray when you throw it away?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

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