Number 8549176320 is so unique. Why is unique about this number? Ah! Click here to read the solution. All numbers(0-9) appears in alphabetical order and once. Share Brain TeaserFacebookGoogle+TwitterPinterestLinkedIn Related Brain Teaser:The Cassette RecorderJanuary 18, 2018Crack The CodeJanuary 18, 2018The Crime SceneJanuary 18, 2018The ShooterJanuary 18, 2018