Antarctica is located 0 degrees north and 40 degrees east.
Japan is at 35 degrees north and 140 degrees east.
None. 90 North is the North Pole.
That point is in the sea, about 120 miles southeast of Singapore.
51 degrees North and 0 degrees East or West (at Greenwich).
51 degrees North and 0 degrees east/west
51 degrees north and 0 degrees east/west
A set of latitude/longitude numbers describes a single point on Earth, so it's not possible for an entire nation to be right exactly there. That particular point is one of an infinite number of them, each with a different set of coordinates, in Mongolia. It's about 160 miles southwest of Ulaan Baatar.
0 degrees and 60 degrees East
Indonesian territory.
The direction of a vector pointing due north is measured in degrees clockwise from the north, with 0° being due north. The direction of a vector pointing due east is measured in degrees counterclockwise from the east, with 0° being due east.
Kenya