It's too complicated to have the complete full diff.
To ease this, I'll create a branch with the latest code from the Github. Then I'll apply https://phabricator.kde.org/D8531, and we will be able to start from a clean base.

Regarding the choice between ascending/descending, I've though more about it and I'm going to change my mind (sorry). Having an option in the configuration is not the best way to deal with it (children won't take a look).
It would be better to have a choice when starting the activity. I'm not sure which way is the best between all the potential sorting (numbers/letters...) and having a menu like in lang or having separate activities + a "simple" choice when starting the activity between "Ascending" and "Descending".

Ok. Let me know when you decide about it.

I merged in ascending_order branch to continue the work.
So first diff would be to recreate a new diff from https://phabricator.kde.org/D8531 from the branch to only have your changes.

You can also apply on this diff the required changes from Dec 9 2017, 5:43 PM:
(There are the comments made on May 16 on github (https://github.com/gcompris/GCompris-qt/pull/172) to fix.
Can you also update the qml import to use the same as the other activities and adding in the ActivityInfo.qml the translator helpers (like in https://github.com/gcompris/GCompris-qt/blob/master/src/activities/advanced_colors/ActivityInfo.qml#L26)?)

Then, regarding the decision, it's better to have a discussion (you can start one by mail with the different propositions, advantages and drawbacks...).
For me, we should not have too much configuration to play the activity (type of activity + ascending/descending + categories corresponding to the min/max numbers).
For type of activity (numbers/letters/weights...), it can be done by doing separate activities. Then for ascending/descending + categories, it's too be discussed on how to do them.

Ok. Should I abandon this revision and create a new one without the config option and only with the hints? Then we can easily apply changes after considering various proposals on what you are proposing.

Yes, please :).
You can also abandon https://phabricator.kde.org/D8531 once you have taken in account the comments in the new diff.
Thank you