If Caleb and Andrew work together on a project, they will complete it in 10 days. If Andrew were to work with Audrey on the same project, they will take a day longer. If Audrey and Lily work together, they will take 150% more time than Caleb and Andrew. If Caleb and Lily were to work together, how many more days will they take to complete the project compared to Andrew and Audrey working together?
Time taken by Caleb and Andrew in percent = 100%
Time taken by Audrey and Lily = 100% + 150% = 250%

Time taken by Caleb and Andrew = 10 days ---- (1)
Time taken by Andrew and Audrey = 11 days ---- (2)
Time taken by Audrey and Lily = 250% x 10 = 25 days ---- (3)

(1) + (2) + (3)
Caleb + Andrew + Andrew + Audrey + Audrey + Lily → 10 + 11 + 25 = 46 days
Caleb + 2 (Andrew + Audrey) + Lily → 46 days
Caleb + Lily + 2 x 11 → 46 days
Caleb + Lily → 46 - 22 = 24 days

More days to complete the project for Caleb and Lily compared to Andrew and Audrey
= 24 - 11
= 13

Answer(s): 13