If Isaac and Michael work together on a project, they will complete it in 10 days. If Michael were to work with Gabriel on the same project, they will take a day longer. If Gabriel and Zoe work together, they will take 70% more time than Isaac and Michael. If Isaac and Zoe were to work together, how many more days will they take to complete the project compared to Michael and Gabriel working together?
Time taken by Isaac and Michael in percent = 100%
Time taken by Gabriel and Zoe = 100% + 70% = 170%

Time taken by Isaac and Michael = 10 days ---- (1)
Time taken by Michael and Gabriel = 11 days ---- (2)
Time taken by Gabriel and Zoe = 170% x 10 = 17 days ---- (3)

(1) + (2) + (3)
Isaac + Michael + Michael + Gabriel + Gabriel + Zoe → 10 + 11 + 17 = 38 days
Isaac + 2 (Michael + Gabriel) + Zoe → 38 days
Isaac + Zoe + 2 x 11 → 38 days
Isaac + Zoe → 38 - 22 = 16 days

More days to complete the project for Isaac and Zoe compared to Michael and Gabriel
= 16 - 11
= 5

Answer(s): 5