Abreast
131Kirkman's schoolgirl problem — is a problem in combinatorics proposed by Thomas Kirkman in 1850 as Query VI in The Lady s and Gentleman s Diary . The problem states:Fifteen young ladies in a school walk out three abreast for seven days in succession: it is required to arrange… …
132Hawker Siddeley Trident — HS121 Trident Trident 1 G ARPC at the SBAC Farnborough Airshow, 8 September 1962. Role …
