We are supposed to answer a quiz question and all we have is an address.
Inspecting transactions for that address on creeper, we get:
Account: ban_1cd8...odbequiz transactions:
ban_3x8...sfdqptwo sent 1 ban
ban_3mh...rrhop1us sent 1 ban
ban_1ic...krjrgtwo sent 1 ban
ban_3ri...mnhequa1 sent 1 ban
Notice the puzzle address ends with "quiz", check the other transactions endings, we get:
two plus two equal
Recognizing this famous question, we need to answer in the same way by sending 19 bans to the quiz address using an address ending with the answer. Using the banano vanity we can quickly search for seed whose address match a certain pattern.
Addresses ending with 4 were also accepted and multiple answers others as well, including creative answers:
Three people sent 19 bans from the address with this seed: