Restoring an iPad to factory settings without the password can be tricky, but it's not impossible. Whether you've forgotten your password or bought a used iPad locked with someone else's password, there are ways to reset it to its original state. Here are some steps you can take:

1. Using iTunes: Connect your iPad to a computer with iTunes installed. Put the iPad into recovery mode by following the specific steps for your iPad model. Once in recovery mode, you can restore the iPad to factory settings.
2. Using iCloud: If the iPad is linked to an iCloud account, you can erase it remotely. Go to iCloud.com and sign in with the Apple ID linked to the iPad. Select the iPad from the list of devices and choose the option to erase it.
3. Using third-party tools: There are tools available online that claim to unlock iPads without the password. Be cautious when using these tools and ensure they are from reputable sources.

It's important to note that restoring an iPad to factory settings will erase all data on the device, so make sure to back up any important information beforehand.