THE ANSWER: SOMEONE HAS HIT THE JACKPOT WITH THE ANSWER
Number 6 channel is blocked at the end.
LET’S CLAP FOR THE GENIUS WITH EXPLANATION: SISTER IMUETIYAN FROM OASIS, BÉNIN CITY.
Looking closely at the channels, the channels suppling the Lipton tea to cups 3,4,5 &7 are blocked. No channel is supplying cup 2. As the tea keeps pouring, the only available channel for outlet as the tea returns is channel supplying cup 6. This channel is block also. This leads us to number 1 cup.
Cup no 5
Looking at the diagram cup 1 3 4 5&7 are blocked cup 2 has no channel at all cup 6 will fill up first.
Cup Number 5
The channel supplying cup 6 is blocked under there is no supply to the cup, the answer is channel one
Powerful!
Cup number 5