untake

Think the extreme case - what if the site is down for a whole month, a whole day? Then you can understand.

Another way: you have nothing else to do at the time. so you might click the ads. But now the site is down, there is no ads for you to click.

True.

Wrong: math is neither hard nor difficult. It is this single belief that deters many people from learning it. Math is all about logic. It is nothing but how to go from A to B. Any person who can reason should be able to be good at math.