This is too funny to not share!
Some of the requests like listening to multiple songs and type in the number which changed instruments are genuinely difficult.
The 3D puzzles can be very tricky as well. Whose genius idea is this??
For what it’s worth, captchas have been used for training image recognition “AI” well before AI became such a hot topic buzzword. Especially in the automotive industries - it’s why a lot of captchas are like “please select images that have a street light” or “bicycles”.