Talk:Armor/@comment-24.118.110.197-20130201075214/@comment-72.229.239.164-20130215074512

You are not "doubling" the amount of armor *added* when you increase from 0 to 100, as when you increase from 100 to 200. Both times you are increased your armor by 100 and both times you are making yourself take 1 more "hit" to kill:

A champion with 1000 hp is being attacked by a champion with Attack Damage of 100.

With 0 armor they will take 10 hits to kill. (Now let's spend a static amount of gold on an item that will increase armor by 100...)

With 100 armor they will take 20 hits to kill. (Notice we spent a static amount of gold on that 100 armor increase and we now take 10 more hits to kill. Let's buy another of that same item and increase our armor by another 100, bringing us to 200 armor...)

With 200 armor they will take 30 hits to kill. (Notice again, we spent the same amount of gold and get the same increase in the hits it takes to kill us.)

Therefore there are no diminishing returns if you are just looking at gold spent on an armor increase and the resulting hits it takes to kill you.

I hope this helps clear it up for you. :-)