Google has updated a new feature to recover hacked account or in case of lost password. Now Google also remembers the older passwords too. If you have changed the password and you are trying to login with the older password, then Google will notify you that You have changed your password some time (it will clearly show the time in day or hours).
I know you are thinking how this feature is going to help in case of account being hacked..
Yeah this can.
Suppose some one have hacked your gmail account and also changed all the recovery options. Then you have no simple way to get back your account. is there?? no.
Now the scene is different. Some one hacked your Gmail account. But you will try to login with older password because the new password is not changed by you. In this case, Google will tell you that the password has been changed. And it will also ask you."Didn't change your password?".
If you had not changed the password then this link will help you to get back your hacked Gmail account by answering some simple questions.