If Victoria and Matthew work together on a project, they will complete it in 12 days. If Matthew were to work with Charlotte on the same project, they will take a day longer. If Charlotte and David work together, they will take 150% more time than Victoria and Matthew. If Victoria and David were to work together, how many more days will they take to complete the project compared to Matthew and Charlotte working together?
Time taken by Victoria and Matthew in percent = 100%
Time taken by Charlotte and David = 100% + 150% = 250%

Time taken by Victoria and Matthew = 12 days ---- (1)
Time taken by Matthew and Charlotte = 13 days ---- (2)
Time taken by Charlotte and David = 250% x 12 = 30 days ---- (3)

(1) + (2) + (3)
Victoria + Matthew + Matthew + Charlotte + Charlotte + David → 12 + 13 + 30 = 55 days
Victoria + 2 (Matthew + Charlotte) + David → 55 days
Victoria + David + 2 x 13 → 55 days
Victoria + David → 55 - 26 = 29 days

More days to complete the project for Victoria and David compared to Matthew and Charlotte
= 29 - 13
= 16

Answer(s): 16