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So, it was a two-row panorama of 3 images in each row - 6 in total, and 5 shots with different exposures in each of 6. Total - 30 images.
You were the closest to the exact number after the winner @sjarvie5 who guessed 30 :)
Congrats, 2nd place!

As for the technique itself, lately I've started to use it more often in difficult light conditions, both on a drone and with a camera, and usually I like the results.

so i missed it totally in technical aspects but was really close to guess it :D

Yep :) in fact, it is a funny part of many such games - you can guess right or almost right completely by chance.