R is the set of positive odd integers less than 50, and S is the set of the squares of the integers in R. How many elements does the intersection of R and S contain ? Choose the correct answer:
A) None  B) Two  C) Four  D) Five  E) Seven
squares &lt; 50 {1,4,9,16,25,36,49 }   S = {1,9,25,49}   R = {1,3,.....49}   Hence Four.
<result>C</result>
R is the set of positive odd integers less than 50, and S is the set of the squares of the integers in R. How many elements does the intersection of R and S contain ?