__  1.  3 squared   A.  25  __  2.  5 squared   B.  20  __  3.  15^{2}   C.  10^{2}  __  4.  81   D.  289  __  5.  100   E.  15 x 15  __  6.  361   F.  19 x 19  __  7.  The 13th perfect square   G.  9^{2}  __  8.  The 17th perfect square   H.  12  __  9.  The square root of 144   I.  3 x 3  __  10.  The square root of 400   J.  169 
