Is this possible to show how many new user have been created from last admin login to present? please let me know if it possible

Its not working, I'm writing the correct captcha but its not letting to register by saying incorrect captcha message, please let me know if I'm missing anything.

I am not able to add new tab for the existing menu, I ahve menu with 9 tab, now I'm trying to add new tab with www.example.com url, but its overwriting the existing tab or not adding , but i'm getting successfull saved message, please help me come...