The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders.
Numbers in many ways don't show us the situation in the world and this time you can see by yourself how much food does one family have for one week in 21 different countries around the world.
Find out if you are really familiar with the basics of Microsoft Excel by going through some basic questions and start building your knowledge profile.
Cool thing about Google Drive is you can access all your documents from anywhere and you can actually upload a Microsoft PowerPoint presentation which automatically turns into Google Drive Slide.
