25 (number)

25 was a number.

The Fifth Doctor defined a generation as twenty-five years. (TV: Four to Doomsday)

By 2022, Abby McPhail was 25 years old. (AUDIO: SOS)

References in invalid sources
Diana Goddard was 25 years old in 2012. (NOTVALID: The Last Dalek)

The Doctor's Five Hundred Year Diary referenced "[ sums] of human knowledge" of 25%, 50%, 75%, and 100%. (NOTVALID: Tom Baker stars in John Lloyd's lost Doctor Who adventure, The Doomsday Contract)