Welcome to the fascinating world of arithmetic

The rules are pretty simple:

• You will be given a series of numeric intervals.
• For each interval you have to type in how many numbers are in that interval.

In this version of the game you will be using the following types of intervals:

• The open interval:
  e.g (0,9) has 8 numbers.
• The half-open interval:
  e.g (0,9] has 9 numbers.
• The closed interval:
  e.g [0,9] has 10 numbers.