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

Time taken by Nora and Elizabeth = 10 days ---- (1)
Time taken by Elizabeth and Chloe = 11 days ---- (2)
Time taken by Chloe and Sophia = 250% x 10 = 25 days ---- (3)

(1) + (2) + (3)
Nora + Elizabeth + Elizabeth + Chloe + Chloe + Sophia → 10 + 11 + 25 = 46 days
Nora + 2 (Elizabeth + Chloe) + Sophia → 46 days
Nora + Sophia + 2 x 11 → 46 days
Nora + Sophia → 46 - 22 = 24 days

More days to complete the project for Nora and Sophia compared to Elizabeth and Chloe
= 24 - 11
= 13

Answer(s): 13