| 1 | A | B | C | D | E | F | G | H | I |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | British Rail Class 483 - Fleet details |  |  |  |  |  |  |  |  |
| 3 | Unit No. | Vehicle Nos. | Vehicle Nos. | Vehicle Nos. | Vehicle Nos. | Delivered to LPTB | Delivered to LPTB | Livery | Status |
| 4 | Unit No. | DMSO(A) | DMSO(A) | DMSO(B) | DMSO(B) | DMSO(A) | DMSO(B) | Livery | Status |
| 5 | 483001 | 121 | ex-10184 | 225 | ex-11142 | 19 Aug 1939 | 27 Feb 1939 | NSE | Scrapped at Ryde St Johns Road, June 2006. |
| 6 | 483002 | 122 | ex-10221 | 222 | ex-11221 | 13 Nov 1939 | 13 Nov 1939 | London Transport Red | Stored at Ryde St Johns Road since 2008, being stripped for spare parts. |
| 7 | 483003 | 123 | ex-10116 | 221 | ex-11184 | 10 Jan 1939 | 19 Aug 1939 | NSE | This unit was stored in a siding near Ryde St. Johns Road for spare parts and was broken up in April 2000 |
| 8 | 483004 | 124 | ex-10205 | 224 | ex-11205 | 10 Oct 1939 | 10 Oct 1939 | London Transport Red | In service. |
| 9 | 483005 | 125 | ex-10142 | 223 | ex-11116 | 27 Feb 1939 | 10 Jan 1939 | NSE | Scrapped at Ryde in April 2000 |
| 10 | 483006 | 126 | ex-10297 | 226 | ex-11297 | 1 July 1940 | 1 July 1940 | London Transport Red | In service. |
| 11 | 483007 | 127 | ex-10291 | 227 | ex-11291 | 17 Jun 1940 | 17 Jun 1940 | London Transport Red | In service. |
| 12 | 483008 | 128 | ex-10255 | 228 | ex-11255 | 26 Feb 1940 | 26 Feb 1940 | London Transport Red | In service. |
| 13 | 483009 | 129 | ex-10289 | 229 | ex-11289 | 10 Jun 1940 | 10 Jun 1940 | London Transport Red | Stored at Ryde St Johns Road since 2019, being stripped for spare parts. |
| 14 | (483010) | - | ex-10139 | - | ex-11172 | 20 Feb 1939 | 13 Jul 1939 | Blue undercoat | Most of 483010 was gutted out at Ryde St Johns Road for spares in 2001. The unit has since been scrapped. |

Question: How many vehicles formed each unit, and what was the numbering possibilities for each of the vehicles?
Answer: Each unit was formed by two vehicles, numbered 121–129 and 221–229.