Question

what digit can be in the ones place of a number that has 5as a factor

Answer 1

25 or 5- your question is not very clear

Answer 2

0 or 5 because since 5 is the factor, you're going to be counting by fives. Each number that goes up by 5 has a 0 or a 5 as the ones place digit. 5, 10, 15, 20, 25, etc.