it takes 10 minutes to boil one egg, how minutes it take to boil ten eggs?

well, if you boil all the ten eggs all at once, then it will only take 10 minutes...^^,)

It still takes 10 minutes to boil ten eggs as I will put them all in one sauce pan to boil in one go.

Well if you boiling them seperatly (there is no reason to do it this way)! The right way to do it is Boil them all together for ten minutes!

same 10 minutes if you boil all of them together. 100 minutes if you boil them one by one. Choose the answer based on the your situation and what you want to do... BTW, practically it just takes not more than 3-4 minutes for the egg to get boiled.;)