A person looks into the bag of a bird hunter. And tells the hunter:
There are all sparrows but six; there are all pigeons but six; and there are all ducks but six.
Now help the hunter and tell how many birds are there in the bag?
+934 If there are only 3 types of birds, that means that the sum of two types of birds equals 6. Which means there are 3 birds of each type. 3 * 3= 9 birds.
