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

Time taken by Lucy and Mia = 10 days ---- (1)
Time taken by Mia and Luke = 11 days ---- (2)
Time taken by Luke and Caleb = 250% x 10 = 25 days ---- (3)

(1) + (2) + (3)
Lucy + Mia + Mia + Luke + Luke + Caleb → 10 + 11 + 25 = 46 days
Lucy + 2 (Mia + Luke) + Caleb → 46 days
Lucy + Caleb + 2 x 11 → 46 days
Lucy + Caleb → 46 - 22 = 24 days

More days to complete the project for Lucy and Caleb compared to Mia and Luke
= 24 - 11
= 13

Answer(s): 13