Why does a number with 0 in the ones place is divisible by 10?

A number with 0 in the ones place is divisible by 10 because of the definition of divisibility. A number is divisible by 10 if it can be expressed as 10 times another integer. Since the presence of 0 in the ones place indicates that the number is a multiple of 10, it confirms that the number can be evenly divided by 10 without any remainder.