It is not working anymore, bcs it was invalidated by introducing BigInt instead strings before.

Nice! I didn't know about that. Powerful s#*t !

There is no \0 at the end of the input. I know this isn't necessary, as the input is always 3 chars long, but it would be good to conform to most other katas.

Also, this shouldn't cause any katas to be invalidated, so I see no reason not to include it.

select table schema

age_min (minimum of ages)

age_max (maximum of ages)

Because the instructions ask for the aliases being age_min and age_max

why can't we use min_age and max_age for the alias?

And I thought mine was short.. Damn! :D

Nice!

should be top solution :)

Test coverage was fine, random tests were just broken. I made them actually run and now that solution is failed.

Your forumla is correct, but remember that you have two dimensions here.

Since no colors are used, perhaps I should remove the entire concept of "color" from the kata's title and description. I could then introduce this concept in a next kata with colored tubes.

For me not knowing what color is about that remaining section about color in the description reads somewhat strange.

All tubes have the same weight. Full-stop

That's all there is to know.

https://www.codewars.com/kata/reviews/638c97f52e6f410001ee2b45/groups/6485e0d13dad1a0001978c08

This kata needs more tests + random tests too.

This kata need more tests