What does below rebus means ?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

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

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

Can you write down eight eights so that they add up to one thousand?

Using eight eights and addition only, can you make 1000?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

Which is the smallest number that you can write using all the vowels exactly once?