Step 1 : Introduction to the question "How many seeds are in an average medium-sized pumpkin?"
...The best way to estimate the number of seeds in a pumpkin is to count the number of sections the pumpkin has, then multiply that number by 16. An average, medium-sized pumpkin will usually contain around 500 seeds. The number of seeds can vary, depending on the type of pumpkin it is and its size and weight. Pumpkin seeds are a tasty snack to some and contain rich amounts of protein and fiber. They are also good sources of zinc, manganese and iron. The only completely accurate way to determine how many seeds a pumpkin has is to cut it open and count them. Source: Reference.com