Question 73
There are 17 girls and 12 boys on the playground. How many children, at least, would have to join them, so that they could be divided into two groups of equal sizes both containing equal numbers of girls and boys?
(A) 1 (B) 3 (C) 5 (D) 7 (E) 9
(A) 1 (B) 3 (C) 5 (D) 7 (E) 9