If two I added to the greatest 5-digit number, the number will be _____?

1 more than smallest 6-digit

1 less than greatest 6-digit

1 more than greatest 6-digit

None of these

The greatest 5-digit number is 99999.

Adding 2 gives 99999 + 2 = 100001, which is 1 more than the smallest 6-digit number (100000).