3 + 3 = 6 :p

fill 3 gallon container and move oil from it to 5 gallon container ... now again fill 3 gallon container and move oil from it to 5 gallon one ... it should end up with 1 gallon in 3 gallon container...

---------- Post added at 01:48 PM ---------- Previous post was at 01:46 PM ----------

3rd ka answer shayad.... 7 members in family ...

---------- Post added at 01:53 PM ---------- Previous post was at 01:48 PM ----------

I think it's like this...

1
11
21
1211
111221
312211
13112221
13311211 <==