The Farmer and the Animals

             Farmer Thimmayya bought some mules at Rs. 50 each sheep at Rs. 40 each, goats at Rs. 25 each, and pigs at Rs. 10 each. The average price of the animals per head worked to Rs. 30

           How many animals of each kind did he buy?

Answer: He bought at least 1 mule, 1 ox, 2 goats and 1 pig. Other answers are possible.