Question
Simon and Henry take 5 days to assemble a toy house. Henry and Ryan take 6 days to build the same house while Simon and Ryan take only 3 days. How many complete days would the three of them take to build the same toy house?
4 m

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Simon and Henry take 5 days to assemble a toy house. Henry and Ryan take 6 days to build the same house while Simon and Ryan take only 3 days. How many complete days would the three of them take to build the same toy house?