Classify each of the following as either even or odd number: 1, 3, 15, 24, 56, 47, 4, 88, 13, 10, 74, 35, 99, 82, 6, 59, 73, 12, 68, 9.

Odd numbers are numbers that cannot be divided exactly by 2. They include: 1, 3, 9, 13, 15, 35, 47, 59, 73, 99.
Even numbers are numbers that can be divided by 2. They include: 4, 6, 10, 12, 24, 56, 68, 74, 82, 88.