Quant

[harsh.champ]

Apple, Bombardier, Chat.sun and Doomsayer are to compile this year's Quant Question A Day.
They can finish this work together in a certain number of integer days. However, they work two in a day and it is found that the compilation is completed when (Apple, Bombardier), (Bombardier, Chat.sun) and (Chat.sun, Doomsayer) worked for respectively 5, 9 and 4 days or 7, 6 and 5 days. They could not have all together done the work in

(1)8 days
(2)9 days
(3)10 days
(4)11 days
(5)12 days

[thephoenix]

Apple, Bombardier, Chat.sun and Doomsayer are to compile this year's Quant Question A Day.
They can finish this work together in a certain number of integer days. However, they work two in a day and it is found that the compilation is completed when (Apple, Bombardier), (Bombardier, Chat.sun) and (Chat.sun, Doomsayer) worked for respectively 5, 9 and 4 days or 7, 6 and 5 days. They could not have all together done the work in....is this part correct
(1)8 days
(2)9 days
(3)10 days
(4)11 days
(5)12 days

[ajith]

Apple, Bombardier, Chat.sun and Doomsayer are to compile this year's Quant Question A Day.
They can finish this work together in a certain number of integer days. However, they work two in a day and it is found that the compilation is completed when (Apple, Bombardier), (Bombardier, Chat.sun) and (Chat.sun, Doomsayer) worked for respectively 5, 9 and 4 days or 7, 6 and 5 days. They could not have all together done the work in

(1)8 days
(2)9 days
(3)10 days
(4)11 days
(5)12 days

What does that mean? (Highlighted in red) (How come two possibilities?)

They work two in a day? (Highlighted in blue) ( I do not understand what is meant by this)

and of course, Phoenix's question

[harsh.champ]

Apple, Bombardier, Chat.sun and Doomsayer are to compile this year's Quant Question A Day.
They can finish this work together in a certain number of integer days. However, they work two in a day and it is found that the compilation is completed when (Apple, Bombardier), (Bombardier, Chat.sun) and (Chat.sun, Doomsayer) worked for respectively 5, 9 and 4 days or 7, 6 and 5 days. They could not have all together done the work in

(1)8 days
(2)9 days
(3)10 days
(4)11 days
(5)12 days

What does that mean? (Highlighted in red) (How come two possibilities?)

They work two in a day? (Highlighted in blue) ( I do not understand what is meant by this)

and of course, Phoenix's question

__________________________________________
1)"Highlighted in red" - It means that we have to consider 2 possibilities.
2)"Two in a day" means only 2 people work on a particular day(not 1 or not 3)
3)"Not" means that we have to find the incorrect answer as we are considering more than 1 possibility.

A very lengthy question though but 2-3 of these types do creep in.