[Table] header: Tie no | Home team | Score | Away team | Date row 1 : 1 | Blackpool | 0–1 | Altrincham | 17 November 1984
row 2 : 2 | Darlington | 3–2 | Chester City | 17 November 1984
row 3 : 3 | Burnley | 9–0 | Penrith | 17 November 1984
row 4 : 4 | Preston North End | 4–3 | Bury | 17 November 1984
row 5 : 5 | Rochdale | 1–2 | Doncaster Rovers | 17 November 1984
row 6 : 6 | Weymouth | 0–3 | Millwall | 17 November 1984
row 7 : 7 | Gillingham | 2–1 | Windsor & Eton | 17 November 1984
row 8 : 8 | Northwich Victoria | 3–1 | Crewe Alexandra | 17 November 1984
row 9 : 9 | Macclesfield Town | 1–2 | Port Vale | 17 November 1984
row 10 : 10 | Lincoln City | 1–1 | Telford United | 17 November 1984
row 11 : Replay | Telford United | 2–1 | Lincoln City | 20 November 1984
row 12 : 11 | Wrexham | 0–2 | Wigan Athletic | 17 November 1984
row 13 : 12 | Stockport County | 1–2 | Walsall | 17 November 1984
row 14 : 13 | Bangor City | 1–1 | Tranmere Rovers | 17 November 1984
row 15 : Replay | Tranmere Rovers | 7–0 | Bangor City | 20 November 1984
row 16 : 14 | Brentford | 4–0 | Bishop's Stortford | 17 November 1984
row 17 : 15 | Bristol Rovers | 2–1 | King's Lynn | 17 November 1984
row 18 : 16 | Northampton Town | 2–2 | VS Rugby | 17 November 1984
row 19 : Replay | VS Rugby | 0–1 | Northampton Town | 21 November 1984
row 20 : 17 | Plymouth Argyle | 3–0 | Barnet | 17 November 1984
row 21 : 18 | Bradford City | 7–2 | Tow Law Town | 17 November 1984
row 22 : 19 | Hull City | 2–1 | Bolton Wanderers | 17 November 1984
row 23 : 20 | Southend United | 2–2 | Colchester United | 17 November 1984
row 24 : Replay | Colchester United | 3–2 | Southend United | 21 November 1984
row 25 : 21 | Exeter City | 2–2 | Enfield | 17 November 1984
row 26 : Replay | Enfield | 3–0 | Exeter City | 20 November 1984
row 27 : 22 | Mansfield Town | 2–1 | Rotherham United | 17 November 1984
row 28 : 23 | Halifax Town | 2–0 | Goole Town | 17 November 1984
row 29 : 24 | Newport County | 1–1 | Aldershot | 17 November 1984
row 30 : Replay | Aldershot | 4–0 | Newport County | 20 November 1984
row 31 : 25 | Torquay United | 2–0 | Yeovil Town | 17 November 1984
row 32 : 26 | York City | 2–0 | Newcastle Blue Star | 17 November 1984
row 33 : 27 | Metropolitan Police | 0–3 | Dartford | 17 November 1984
row 34 : 28 | Hereford United | 3–0 | Farnborough Town | 17 November 1984
row 35 : 29 | Kettering Town | 0–0 | Bournemouth | 17 November 1984
row 36 : Replay | Bournemouth | 3–2 | Kettering Town | 20 November 1984
row 37 : 30 | Barry Town | 1–2 | Reading | 17 November 1984
row 38 : 31 | Nuneaton Borough | 1–1 | Scunthorpe United | 17 November 1984
row 39 : Replay | Scunthorpe United | 2–1 | Nuneaton Borough | 20 November 1984
row 40 : 32 | Whitby Town | 1–3 | Chesterfield | 17 November 1984
row 41 : 33 | Buckingham Town | 0–2 | Orient | 17 November 1984
row 42 : 34 | Burton Albion | 2–0 | Staines Town | 17 November 1984
row 43 : 35 | Dagenham | 0–0 | Swindon Town | 19 November 1984
row 44 : Replay | Swindon Town | 1–2 | Dagenham | 26 November 1984
row 45 : 36 | Cambridge United | 0–2 | Peterborough United | 17 November 1984
row 46 : 37 | Swansea City | 1–1 | Bognor Regis Town | 17 November 1984
row 47 : Replay | Bognor Regis Town | 3–1 | Swansea City | 21 November 1984
row 48 : 38 | Frickley Athletic | 2–1 | Stalybridge Celtic | 17 November 1984
row 49 : 39 | Hartlepool United | 2–1 | Derby County | 17 November 1984
row 50 : 40 | Fisher Athletic | 0–1 | Bristol City | 17 November 1984 [/Table] Answer this question based on the above table: What is the tie no when scunthorpe united was the away team?

Answer: 31.0