If Joshua and Samantha work together on a project, they will complete it in 5 days. If Samantha were to work with Mason on the same project, they will take a day longer. If Mason and Charlotte work together, they will take 100% more time than Joshua and Samantha. If Joshua and Charlotte were to work together, how many more days will they take to complete the project compared to Samantha and Mason working together?
Time taken by Joshua and Samantha in percent = 100%
Time taken by Mason and Charlotte = 100% + 100% = 200%

Time taken by Joshua and Samantha = 5 days ---- (1)
Time taken by Samantha and Mason = 6 days ---- (2)
Time taken by Mason and Charlotte = 200% x 5 = 10 days ---- (3)

(1) + (2) + (3)
Joshua + Samantha + Samantha + Mason + Mason + Charlotte → 5 + 6 + 10 = 21 days
Joshua + 2 (Samantha + Mason) + Charlotte → 21 days
Joshua + Charlotte + 2 x 6 → 21 days
Joshua + Charlotte → 21 - 12 = 9 days

More days to complete the project for Joshua and Charlotte compared to Samantha and Mason
= 9 - 6
= 3

Answer(s): 3