Question: is 10 a natural number?
Answer: The natural numbers (i.e. counting numbers) are numbers which are used for counting and ordering. They can be expressed mathematically as: ℕ = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, ... } ... For example, the integers (ℤ) are simply the natural numbers ℕ, 0, and the negatives of the natural numbers.