ioo Perfect test score Ripe old age Perfect test paper marking Yellowstone's age, parkwise Years in a century That Will Smith movie you always see in crosswords Senate complement Knick score, at times Certain S&P global index Arabic equivalent of C hidden in this puzzle's five longest answers 37-Across's age on May 29, 2003 Enviable test score C-note Celsius steam point Five score Perfect score on a test ___ to 1 (long shot) C, to Cato Grade A grade Decimal number