7 Cups - Which cup will get filled first? ( Version 1 )

8 Cups Version - https://www.youtube.com/watch?v=sJO2gNYcZT8 This is Viral whatsapp, facebook puzzle. Which Tank will be filled first or Which cup get filled firstly? Observe carefully and then answer. 99% people failed to solve this Cup puzzle. For more puzzles - http://puzzlebot.org/