Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

What brings you down but never up?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

If an electric train is travelling south, then which way is the smoke going?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

John was piloting a plane behind a car but was never able to overtake it. Why?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?