Explanation
The equator passes through 13 countries : 1. Ecuador, 2. Colombia, 3. Brazil, 4. Sao Tome & Principe, 5. Gabon, 6. Republic of the Congo, 7. Democratic Republic of the Congo, 8. Uganda, 9. Kenya, 10. Somalia, 11. Maldives, 12. Indonesia 13. Kiribati.