Q: i have iPad2 which cannot be updated to iOS10 so i want to replace my iPad with new iPad which can be updated to iOS10 ?

Buy another iPad that supports it, that is the only solution.

These devices are compatible with iOS10:

I found that information on this Apple web page:

http://www.apple.com/ios/ios-10/

I don't know what solutions you're expecting from the community. I'd buy at least an iPad Air 2 or newer if I have the money. If money is tight, opt for refurbished iPad. They all come with 1 year warranty. If it isn't a problem, buy the latest iPad.

If you think you need to purchase a new iPad, buy a new iPad.

You're at a good time of year to be buying a new iPad. If you can be patient there are surely going to be some sales for the holidays. Last year I got a 64 gig mini iPad for the price of a 32 gig.

I would go as new as you can afford. And if you wait for the sales, you can get new ones for the price that refurbished are now. For a full sized I'd go for an air or air 2 or Mini 4.

No. The iPad 2 joins the iPad 1 and iPad 3 in the 'no more updates' club.

there MIGHT be a security patch if Apple feels like it, but beyond that no more updates.

Your iPad will continue to work as it does for a while anyway. Now 'while' may be months or years, but you'll notice that your installed apps no longer get updates. It'll be like a time capsule...frozen in time, so to speak.