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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.
The description of the problem was slightly confusing but I finally figured it out.
I think the word "currently" should be taken out and it should say "Julie is x years older than her brother, and she is also y times as old as him."
Also for consistency, could you correct the parameters in the python function to be x,y or correct the parameters in the description to be plus, times?
Submitted a Python translation.
Minor typos/gramatical errors.
The last test fails because it needs to be rounded to 2 decimal places, but no where in the description is that specified.