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Our Sun is one of them. Earth is one of the eight planets moving around our Sun.

And the Earth has over 7,000,000,000 people.

You are one of 1,200,000,000 people living in India!

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 * 1) Write the number of zeroes that follow the digit 1 in a) lakh, b) 10 million, c) 10 lakhs, d) 100 lakhs e) 10 crores.
 * 2) How many years ago was the Earth born? Can you give the answer in two different ways?
 * 3) How many crores of people live in India?
 * 4) A millionth of a second means 'the part that you get when you divide one second into a million parts.' Can you imagine this? A blink of a healthy eye takes a fraction of a second. I can blink three times in one second. Can you tell me how long it takes to blink once?