I can't tell you how many times I've had to ask that question of clients and they can't remember, or don't even know. In this day and age, passwords are as common as your SSN! Do yourself a favor (and me) and get a good password manager for your various devices (phones, computers, and tablets). There are dozens if not hundreds to chose from. Recently the developer for the one I use stopped updating the app. Therefore it no longer sync'd to DropBox, which was where I kept the database file. So I started looking for a replacement. I tried several and settled on Safe-In-Cloud Pro. My reasons were as follows:
It was cheap! Like me. The cost was $4.99 in the PlayStore (not a monthly subscription either).
It works on multiple platforms (Windows, MAC, iOS and Android.
It's sync's with several cloud storage platforms like Google Drive, Dropbox, iCould and others.
Easy to use interface.
It generates strong passwords on the fly, all you have to remember is the Master Password to open the app.
It has browser plug-in's for all the major web browsers to make it easy to login to your favorite sites. It has robust encryption security, so you don't have to worry about hackers stealing your passwords. So my recommendation is try Safe-In-Cloud Pro, you can thank my later :-)