Prove that half of nine equal four. Ah! Click here to read the solution. IX, using roman numerals, you take the upper half of them and it equals four (IV). Share Brain TeaserFacebookGoogle+TwitterPinterestLinkedIn Related Brain Teaser:The Cassette RecorderJanuary 18, 2018Crack The CodeJanuary 18, 2018The Crime SceneJanuary 18, 2018The ShooterJanuary 18, 2018