Numbers whose last digit is 5 or 0 are divisible by which number?

1. Look at the multiples of 5 listed in the table: 5, 10, 15, 20, 25, and so on. 2. Every one of those multiples ends in either a 5 or a 0. 3. That pattern gives the divisibility test: a number ending in 5 or 0 is divisible by 5. _Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 1 "Foundations", section 1.1 Introduction to Whole Numbers_