Problem 8 (centroids): Given points $(a,b)$, $(c,d)$, and $(e,f)$ on the coordinate plane, the coordinates of the centroid are $(\frac{a+c+e}{3},\frac{b+d+f}{3})$. Problem 11 (divisibility): READING THE QUESTION MULTIPLE TIMES WON’T HURT. More time would be wasted just guessing around the the problem meant. Problem 13 (centroids): Centroids of a triangle will…
