In a Quiz the points in each round for the first,second,third and fourth position were 100,50,20,10 . No other points were given. Rachel participated in several rounds in the competition and the product of her score was 10000. In How many rounds did she participate?
Select
A) 2  B) Cannot be determined  C) 4  D) 6  E) 10
Correct answer is B because we are given that there won't be any points awarded for rounds other than 1st four position.   Thus, it may happen that she played 150 rounds out of only 8 rounds were there in which she was awarded some points.
<result>B</result>
In a Quiz the points in each round for the first,second,third and fourth position were 100,50,20,10 . No other points were given. Rachel participated in several rounds in the competition and the product of her score was 10000. In How many rounds did she participate?