Answer:
The common factors of 72 are
- 1,2,3,4,6,8,912,18,24,36,and72
Whatever fossil is at the lowest layer is the oldest cuz the old fossils lived along time ago and when they died the fossils were buried.
Is 195 countries in the world
The smallest country in mainland Africa is The Gambia with a total land area of 10,689 km². It is enveloped by its neighboring country, Senegal.
