Five oceans are in the world, which are the Arctic, Atlantic, Indian, Pacific and Southern.
The six countries are
- Gabon
- Congo
- The Democratic Republic of the Congo
- Uganda
- Kenya
- Somalia
It's easy.
145=2x-5
150=2x
x=75
According to the ICSM (Intergovernmental Committee on Surveying and Mapping), there are five different types of maps: General Reference, Topographical, Thematic, Navigation Charts and Cadastral Maps and Plans.