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

Time taken by Evelyn and Lucy = 10 days ---- (1)
Time taken by Lucy and Audrey = 11 days ---- (2)
Time taken by Audrey and Noah = 160% x 10 = 16 days ---- (3)

(1) + (2) + (3)
Evelyn + Lucy + Lucy + Audrey + Audrey + Noah → 10 + 11 + 16 = 37 days
Evelyn + 2 (Lucy + Audrey) + Noah → 37 days
Evelyn + Noah + 2 x 11 → 37 days
Evelyn + Noah → 37 - 22 = 15 days

More days to complete the project for Evelyn and Noah compared to Lucy and Audrey
= 15 - 11
= 4

Answer(s): 4