The northern by far. Re North/South, the equator cuts through 12 countries, so they may be considered both northern and southern. There are 148 countries solely in the northern hemisphere and 33 solely in the southern. Re East/West, the 0 degrees and 180 degrees lines cut 9 countries - including Britain - so they may be considered both eastern and western. There are 135 countries solely in the eastern hemisphere and 49 solely in the western hemisphere.) A bit of simple arithmetic now shows that a. 12 + 148 + 33 = 193 and b. 9 + 135 + 49 = 193, which is the total number of countries in the world.