Countries by Area (you have to guess area 'category')
For each country type the corresponding area category, which is worked out as follows:
- number of digits in the Area (in square km)
- letter depending on the first digit: A if it's between 1 and 3, B if it's between 4 and 6, C if it's between 7 and 9.
So for example: 456 has three digits, the first digit is a 4, so the answer is 3B