How many versions of the ipad are there?

The number of versions of iPad depends on what you consider a version. Overall there have been 2 versions: the iPad(1), and the iPad 2. Within those 2 groups there are 2 colors from which to choose: Black, or White. Next is the choice of Wi-Fi-only, or Wi-Fi + 3G connectivity. Once you've decided on the type of internet connection you want, you must also choose the size: 16GB, 32GB, or 64GB. Finally if you choose 3G you need to pick AT&T or Verizon. Of currently sold models (iPad 2) that makes 18 versions.