👉 In mathematics, an intercalary number is a number that appears in a specific pattern within another number. These numbers are often used to represent integers or fractions of a given number. For example, consider the number 513 (which can be thought of as a 7-digit number with 4 digits being odd and 3 digits being even). The intercalary numbers that appear in this pattern include: - Intercalary numbers for 5: 5, 10,