Math power:  shortcuts, tricks and puzzles/ Divina Gracia T. Bandong.  -- Baguio City:  Summa Elim Pub.,  2002. <br/>v, 253 p.:  col. ill.;  28 cm. <br/><br/> Includes bibliographical references. <br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics- Problems, exercises, etc.