If Gabriel and Henry work together on a project, they will complete it in 6 days. If Henry were to work with Joseph on the same project, they will take a day longer. If Joseph and Nora work together, they will take 150% more time than Gabriel and Henry. If Gabriel and Nora were to work together, how many more days will they take to complete the project compared to Henry and Joseph working together?
Time taken by Gabriel and Henry in percent = 100%
Time taken by Joseph and Nora = 100% + 150% = 250%

Time taken by Gabriel and Henry = 6 days ---- (1)
Time taken by Henry and Joseph = 7 days ---- (2)
Time taken by Joseph and Nora = 250% x 6 = 15 days ---- (3)

(1) + (2) + (3)
Gabriel + Henry + Henry + Joseph + Joseph + Nora → 6 + 7 + 15 = 28 days
Gabriel + 2 (Henry + Joseph) + Nora → 28 days
Gabriel + Nora + 2 x 7 → 28 days
Gabriel + Nora → 28 - 14 = 14 days

More days to complete the project for Gabriel and Nora compared to Henry and Joseph
= 14 - 7
= 7

Answer(s): 7