How can i remove this numbers? (Sudoku killer app). : r/sudoku

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Cracking the cryptic killer sudoku app puzzle 11. I haven't gotten stuck on one yet and now I've hit a wall. I followed the hints and it still doesn't make sense. Can

What am I missing here? I've applied all the rules I know in killer sudoku including both versions of the 45 rule. But regardless I'm still missing something. Probably something obvious, but

Killer Sudoku From Scratch - Puzzle Genius

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