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

Time taken by Elijah and Joshua = 6 days ---- (1)
Time taken by Joshua and Oliver = 7 days ---- (2)
Time taken by Oliver and Jacob = 250% x 6 = 15 days ---- (3)

(1) + (2) + (3)
Elijah + Joshua + Joshua + Oliver + Oliver + Jacob → 6 + 7 + 15 = 28 days
Elijah + 2 (Joshua + Oliver) + Jacob → 28 days
Elijah + Jacob + 2 x 7 → 28 days
Elijah + Jacob → 28 - 14 = 14 days

More days to complete the project for Elijah and Jacob compared to Joshua and Oliver
= 14 - 7
= 7

Answer(s): 7