Let's say that we have a set \( A = \{1, 2, 3, 4, 5\} \) and a set \( B = \{2, 4, 6, 8, 10\} \). What is the cardinality of the intersection of these two sets?

Step 1 ：The intersection of these two sets would be the set of elements that are common to both sets, which is \( A \cap B = \{2, 4\} \).

Step 2 ：The cardinality of a set is the number of elements in the set. So, we just need to count the number of elements in the set \( A \cap B \).