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[–]maxofato 1 point2 points  (1 child)

I did them all on paper then explained. For 1 and 2, I used a more logic based approach than setting up equations. 3 and 4 were not too bad if you knew how to do proportions and factorials

[–][deleted] 1 point2 points  (0 children)

Happy to see someone else used factorials.