<h1 class="subject">Can I use one google adsense account for many blogspot sites?</h1>

Dear friends, I have a plan of creating over 100 blogspot sites for my earnings. Can i use one google adsense account of as many sites as i want or i have to create adsense account for all sites?

You CAN use your adsense account to put up ads in any of your blogs or websites. There is no specific limit for the number of sites (or blogs) in which you can put Adsense ads.

But, be careful that you don't put up the ads in illegal or other kind of blogs or sites, which may result in cancelling of your account.

YES -- you can use one account for all your blogs. No need to ask permission from Google

However, it is best to actually create channels (maybe URL channels) to be able to track which of your blog actually makes you money, and which you need to focus on

Read Adsense Help's Optimizing with Channels https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=32614

Sure you can I use it for about 20 blogs and webistes as well.

of course. You can use adsense for all your website. Just remember to put your adsense on right website

Adsense blogging Tips http://sensiblegoogleadsense.blogspot.com/