What is the difference between the 25 lessons and the 24 challenges in level 1 ssiw?r
Not sure I get you - are we talking about the difference between the ‘Levels’ (made up of ‘Challenges’) and the old ‘Courses’ (now hidden under ‘Old material’ in the navigation) made up of ‘Lessons’?
If so, the Levels are the newer material… and there are 25 challenges to each Level (apart from Level 3, which is still in production)… 
Dwi’n deall rwan. Diolch.
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