If there is unique and quality content on it, adhears to all of Adsense TOS, than it is OK.

Just make sure you read through the Adsense TOS really well...and I do mean REALLY well

Sincerely, Buyseech

the more pages the better, but it is enough

Traffic = money.

So the question is.. does it have enough traffic?

Of course this means consistent and non spammy traffic, genuine visitors. Especially visitors interested in the content they have landed on.

Good luck.

Depending on what type of blog your posting on, you may or may not see much traffic. Posting on a blog to get traffic though is quite a bit of work. Unless you're really passionate about the topic and love to talk about it, I would keep away from this strategy.