Which of the following countries are located on the Greenwich Meridian?
1. Algeria
2. Germany
3. Guinea
4. Iceland

he Greenwich Meridian, also known as the Prime Meridian, is the line of 0° longitude. It passes through Greenwich, London, and serves as the starting point for measuring both longitude and Coordinated Universal Time (UTC). Among the given options:

Algeria: Yes, it is located on the Greenwich Meridian.
Germany: No, Germany is located to the east of the Greenwich Meridian.
Guinea: No, Guinea is located to the west of the Greenwich Meridian.
Iceland: No, Iceland is located to the west of the Greenwich Meridian.

Therefore, only option 1 (Algeria) is located on the Greenwich Meridian.