I will give a Medal!!

One person can do a certain job in six days, a second person can do the same job in two days, and a third person can do this job in three days. How many days will they take to do the job together?

1 day
2 days
6 days

Question

I will give a Medal!! 

One person can do a certain job in six days, a second person can do the same job in two days, and a third person can do this job in three days. How many days will they take to do the job together?

1 day
2 days
6 days

anonymous · Answer

1 day

phi · Answer

a second person can do the same job in two days,
if *just* this guy worked , it would take 2 days
with help  from the other two, they will be faster (hopefully) than 2 days