How can you write nineteen in a manner that if we take out one, it becomes twenty?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you start the fire using two pieces of wood?

When 99 is considered higher than 100?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?