yes.
Never, unless the calendar is revised in such a way as to start below that number. It would still not repeat the year, just the number.
To back up the test results of the first test. (Same as recounting)
Irrational numbers can not be repeating decimals. Any number that is a repeating decimal is rational.
Recurrence of the shingles. Yes, it can. The shingles is caused by the same virus -- herpes zoster -- that causes the chicken pox. As human beings' life expectancy increases, we are discovering...