Question

Your friend gives you a list of three five-digit numbers, but she only reveals one digit in each: 3?2?? 28??? ?2?2? Can you describe a five-digit number you know for certain will not be on her list? If so, give one: if not, explain why not.

Answer 1

A certain five-digit number that will not be on your friend's list is 00000.

Step-by-step explanation:

One five-digit number that is certain not to be on your friend's list is 00000. Since your friend has revealed one digit in each number, it means that each number will have at least one digit that is different from the digit in the number 00000. The digit in the ones place of 00000 is 0, so any number with a non-zero digit in the ones place will be different from 00000.