Replace the question mark with the number below given a simple math problem.

When it's bad luck to meet a black cat?

How can you make a TV, a bed, a dog, and a car liquid?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

What does this rebus puzzle means ?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?