What do you get if you add 2 to 100 four times?

I know a nine-letter word having only one vowel.
Do you ?

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?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

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

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

My location can be determined by the below rebus.
So where am i ?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

Which tank will fill first?