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1.
Pakistan & Tajikistan?
2.
France & Brazil?
France's longest border is actually Brazil.
5.
El Salvador & Nicaragua?
They share maritime borders but not land borders.
6.
Chad & Cameroon?
Chad is cool.
7.
North Korea & Russia?
Their border is only 18km/11.2mi.
8.
Ireland & United Kingdom?
Northern Ireland is a part of Britain.
10.
Mongolia & Kazakhstan?
They are separated by 55km/34.2mi of Russian land