Which city is three-fifths chick two third cat and 50% goat?

I am white when I am dirty, and black when I am clean. What am I?

Can you make a fire with just a single stick?

Why do you find that most of the buildings are deprived of the 13th floor?

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 has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

It is always ahead of me yet I can never see it. What is it?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

What number comes next in the series?

5 15 5 18 5 24 14 20 _