What aren't you doing for the holidays?

I'm saying please and thank you but not doing these.

What comes next in this series 201 820 192 020 202 120 222 ?

What is four times one half factorial squared?

What is the closest star to the sun?

Is a light year a measure of time, brightness, power. length or stars?

What used to come after Z in the English alphabet?

Without using a calculator, what is four to the power one point five?

Is it true, false or unknown whether or not prime numbers larger than seven are either one less or one more than a number divisible by six?

What three letter acronym means fond attention?

If three a2k.org posters can make a post in two hours how long will it take five posters?