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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.
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889 is not a prime and the highest number with the most number of even digits is 888.
As given in the question. For n = 1000, the highest prime under 1000 is 887.
The highest number that has maximum no of even digit is 889..right?