👉 A denumerable is a mathematical concept in set theory that refers to sets that can be counted or enumerated. In other words, it's like having a count of all possible things in a collection. For example, consider the set {1, 2, 3}. This set has two elements: 1 and 2. It's denumerable because you can count them as follows: - 1 is counted by adding 1 to itself three times. - 2 is also