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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
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Oh wow that's so weird I didn't realise. All the solutions seem to only deal with the static age of the son but it looks like it doesn't matter as long as you understand the maths. I understood the question, just not the maths needed.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution