Q: I cannot download apps made by apple for free

Did you follow these instructions?

Get Apple apps for free on your iPhone, iPad, and iPod touch - Apple Support

Are you signed into the same Apple ID that was used to activate your iPad?

Have you tried signing out of your Apple ID, restart your iPad and then sign in again and try to download the apps again?

Look at Peggy's response here and see if this works.

Re: iWork free for iPhone 5s

I Found that link while reading this one.

http://www.nadynerichmond.com/blog/2013/11/21/how-to-get-pages-keynote-numbers-i photo-and-imovie-for-free-on-your-new-ip…

Bottom of Featured page.

When you are in the App Store, tap on the word Categories at the top and select all categories. If you see a back button, just keep tapping on back until you get to Categories and select all Categories again. Then check for Apps by Apple at the bottom of the App Store.

I knew that you weren't in the USA App Store, but I didn't know where you were. Can you do a search for Pages in your App Store? If you can, what happens when you do the search?