The COUNTIF formula could be used to do this - it looks for specific criteria within a range:
=COUNTIF(range,criteria)
Because your range is split over two sheets, I would also use the OR function, and use the IF function to give your Yes/No result. It could look something like this:
Where the green text is the cell on sheet 1 (ie the number you want to find), the red text is the range on sheet 2, and the blue text is the range on sheet 3.
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