What is 9 +10

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I'm assuming this is a trick question, but have no idea why! (answer typically is 19)

Hi... arithmetic calculations, this answer is incorrect. Is this a trick question?

Sounds like a trick question... haha. have you found the answer yet?

What kind of calculation it’s ??

Haha. No. Any follow up on this

What kind of question is this

The answer is No, not 21.

Trick question?🤔

19. 🙄