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QUESTION
What is the greatest common factor of 30, 45, and 50?
##5##
Factors of ##30## are ##{1,2,3,5,6,10,15,30}##
Factors of ##45## are ##{1,3,5,9,15,45}##
Factor of ##50## are ##{1,2,5,10,25,50}##
Hence common factors are ##{1,5}## and is ##5##.
