If Scarlett and Owen work together on a project, they will complete it in 10 days. If Owen were to work with Christopher on the same project, they will take a day longer. If Christopher and Jack work together, they will take 60% more time than Scarlett and Owen. If Scarlett and Jack were to work together, how many more days will they take to complete the project compared to Owen and Christopher working together?
Time taken by Scarlett and Owen in percent = 100%
Time taken by Christopher and Jack = 100% + 60% = 160%

Time taken by Scarlett and Owen = 10 days ---- (1)
Time taken by Owen and Christopher = 11 days ---- (2)
Time taken by Christopher and Jack = 160% x 10 = 16 days ---- (3)

(1) + (2) + (3)
Scarlett + Owen + Owen + Christopher + Christopher + Jack → 10 + 11 + 16 = 37 days
Scarlett + 2 (Owen + Christopher) + Jack → 37 days
Scarlett + Jack + 2 x 11 → 37 days
Scarlett + Jack → 37 - 22 = 15 days

More days to complete the project for Scarlett and Jack compared to Owen and Christopher
= 15 - 11
= 4

Answer(s): 4