OK based on the site
where you earn 20 grains of rice for each correct question, Bob and I just sat down and counted out the number of grains of rice in a quarter cup. We used natural whole grain brown rice from Uncle Ben's. A quarter cup of dry rice turns into 1 cup (a serving) of cooked rice.
The answer is ....
Really, that was the count
Pretty neat! We counted the whole half cup, we didn't use any estimating techniques.