Table:
Year Built | Works Number | Wheel Arr. | Gauge | Original Owner | Name | Current Location | Notes
1882 | 283 | 0-4-0ST | 1 ft 10 3⁄4 in (578 mm) | Penrhyn Quarry | Charles | Penrhyn Castle Railway Museum | 
1883 | 316 | 0-4-0ST | 2 ft (?) | Penrhyn Quarry | Gwynedd | Bressingham Steam Museum | Penrhyn Port Class
1883 | 317 | 0-4-0ST | 1 ft 11 1⁄2 in (597 mm) | Penrhyn Quarry | Lilian | Launceston Steam Railway | Penrhyn Port Class
1885 | 364 | 0-4-0ST | 22.75 | Penrhyn Quarry | Winifred | Bala Lake Railway | Penrhyn Port Class
1886 | 409 | 0-4-0ST | 1 ft 11 1⁄2 in (597 mm) | Dinorwic Quarry | Velinheli | Launceston Steam Railway | 
1889 | 493 | 0-4-0ST | 1 ft 11 3⁄4 in (603 mm) | Dinorwic Quarry | Elidir | Llanberis Lake Railway | Previously named “Red Damsel”
1890 | 518 | 2-2-0T | (1000mm) | S.V.T. 8 | Tortosa-La Cava1 | Tortosa (catalonia, Spain) | 
1891 | 541 | 0-4-0ST | 1 ft 10 3⁄4 in (578 mm) | Dinorwic Quarry | Rough Pup | Narrow Gauge Railway Museum, Tywyn | 
1891 | 542 | 0-4-0ST | 2 ft (610 mm) | Dinorwic Quarry | Cloister | Purbeck Mineral & Mining Museum | Owned by Hampshire Narrow Gauge Railway Trust, previously at Kew Bridge Steam Museum and Amberley
1891 | 554 | 0-4-0ST | 1 ft 11 1⁄2 in (597 mm) | Cilgwyn quarry, then Penrhyn Quarry Railway | Lilla | Ffestiniog Railway | 
1893 | 589 | 2-4-0ST+T | 1 ft 11 1⁄2 in (597 mm) | Penrhyn Quarry Railway | Blanche | Ffestiniog Railway | Built as 0-4-0ST, converted to 2-4-0ST+T by FR.
1893 | 590 | 2-4-0ST+T | 1 ft 11 1⁄2 in (597 mm) | Penrhyn Quarry Railway | Linda | Ffestiniog Railway | Built as 0-4-0ST, converted to 2-4-0ST+T by FR.
1894 | 605 | 0-4-0ST | 1 ft 11 3⁄4 in (603 mm) | Penrhyn Quarry | Margaret | Vale of Rheidol Railway | Under restoration.[citation needed]
1894 | 606 | 0-4-0ST | 2 ft (?) | Penrhyn Quarry | Alan George | Teifi Valley Railway | 
1895 | 638 | 0-4-0ST | 2 ft (610 mm) | Dinorwic | Jerry M | Hollycombe Steam Collection | 
1896 | 652 | 0-4-0ST | 1 ft 11 1⁄2 in (597 mm) | Groby Granite, then Dinorwic Quarry | Lady Madcap | Welsh Highland Heritage Railway | Originally named Sextus.
1898 | 678 | 0-4-0ST | 2 ft (610 mm) | Dinorwic Quarry | Jonathan | Unknown (previously at Bala Lake Railway then West Lancashire Light Railway) | 
1898 | 679 | 0-4-0ST | 1 ft 11 1⁄2 in (597 mm) | Dinorwic Quarry | Covercoat | Launceston Steam Railway | 
1898 | 680 | 0-4-0ST | 2 ft (610 mm) | Dinorwic Quarry | George B | Bala Lake Railway | 
1898 | 684 | 0-4-0WT | 18 in (457 mm) | John Knowles Co. | Jack | Armley Mills Industrial Museum, Leeds | 
1899 | 705 | 0-4-0ST | 2 ft (610 mm) | Penrhyn Quarry | Elin | Yaxham Light Railway | Previously at the Lincolnshire Coast Light Railway.
1899 | 707 | 0-4-0ST | 1 ft 11 1⁄2 in (597 mm) | Pen-yr-orsedd Quarry | Britomart | Ffestiniog Railway | 
1901 | 763 | 0-4-0ST | 1 ft 11 1⁄2 in (597 mm) | Dorothea Quarry | Dorothea | Launceston Steam Railway | 
1902 | 779 | 0-4-0ST | 2 ft (610 mm) | Dinorwic Quarry | Holy War | Bala Lake Railway | 
1902 | 780 | 0-4-0ST | 2 ft (610 mm) | Dinorwic Quarry | Alice | Bala Lake Railway | 
1902 | 783 | 0-6-0T | (1000mm) | Sociedad General de Ferrocarriles Vasco-Asturiana | VA-21 Nalon | Gijon Railway Museum (Spain) | 
1903 | 822 | 0-4-0ST | 2 ft (610 mm) | Dinorwic Quarry | Maid Marian | Bala Lake Railway | 
1903 | 823 | 0-4-0ST | 2 ft (?) | Dinorwic Quarry | Irish Mail | West Lancashire Light Railway | 
1903 | 827 | 0-4-0ST | 1 ft 11 3⁄4 in (603 mm) | Pen-yr-orsedd Quarry | Sybil | Brecon Mountain Railway | 
1904 | 855 | 0-4-0ST | 1 ft 10 3⁄4 in (578 mm) | Penryn Quarry | Hugh Napier | Penrhyn Castle Railway Museum, Gwynedd | 
1905 | 873 | 0-4-0ST | 2 ft (?) | Pen-yr-orsedd Quarry | Una | National Slate Museum, Llanberis | 
1904 | 894 | 0-4-0ST | 1 ft 11 3⁄4 in (603 mm) | Dinorwic Quarry | Thomas Bach | Llanberis Lake Railway | Originally named “Wild Aster”
1906 | 901 | 2-6-2T | 1 ft 11 1⁄2 in (597 mm) | North Wales Narrow Gauge Railways | Russell | Welsh Highland Heritage Railway | 
1906 | 920 | 0-4-0ST | 2 ft (?) | Penrhyn Quarry | Pamela | Old Kiln Light Railway | 
1909 | 994 | 0-4-0ST | 2 ft (?) | Penrhyn Quarry | Bill Harvey | Bressingham Steam Museum | previously George Sholto
1918 | 1312 | 4-6-0T | 1 ft 11 1⁄2 in (597 mm) | British War Department / EFOP #203 | --- | Pampas Safari, Gravataí, RS, Brazil | [citation needed]
1918 / or / 1921? | 1313 | 0-6-2T | 3 ft 3 3⁄8 in (1,000 mm) | British War Department / Usina Leão Utinga #1 / Usina Laginha #1 | --- | Usina Laginha, União dos Palmares, AL, Brazil | [citation needed]
1920 | 1404 | 0-4-0WT | 18 in (457 mm) | John Knowles Co. | Gwen | Richard Farmer current owner, Northridge, California, USA | 
1922 | 1429 | 0-4-0ST | 2 ft (610 mm) | Dinorwic | Lady Joan | Bredgar and Wormshill Light Railway | 
1922 | 1430 | 0-4-0ST | 1 ft 11 3⁄4 in (603 mm) | Dinorwic Quarry | Dolbadarn | Llanberis Lake Railway | 
1937 | 1859 | 0-4-2T | 2 ft (?) | Umtwalumi Valley Estate, Natal | 16 Carlisle | South Tynedale Railway | 
1940 | 2075 | 0-4-2T | 2 ft (?) | Chaka’s Kraal Sugar Estates, Natal | Chaka’s Kraal No. 6 | North Gloucestershire Railway | 
1954 | 3815 | 2-6-2T | 2 ft 6 in (762 mm) | Sierra Leone Government Railway | 14 | Welshpool and Llanfair Light Railway | 
1971 | 3902 | 0-4-2ST | 2 ft (610 mm) | Trangkil Sugar Mill, Indonesia | Trangkil No.4 | Statfold Barn Railway | Converted from 750 mm (2 ft 5 1⁄2 in) gauge. Last steam locomotive to be built by Hunslet, and the last industrial steam locomotive built in Britain.

Question: aside from 316, what was the other works number used in 1883?
Answer: 317

Question: in which year were the most steam locomotives built?
Answer: 1898

Question: which original owner had the most locomotives?
Answer: Penrhyn Quarry

Question: what is the total number of preserved hunslet narrow gauge locomotives currently located in ffestiniog railway
Answer: 554

Question: which works number had a larger gauge, 283 or 317?
Answer: 317

Question: how many steam locomotives are currently located at the bala lake railway?
Answer: 364

Question: after 1940, how many steam locomotives were built?
Answer: 2

Question: who owned the last locomotive to be built?
Answer: Trangkil Sugar Mill, Indonesia

Question: what is the name of the last locomotive to be located at the bressingham steam museum?
Answer: Gwynedd

Question: what is the difference in gauge between works numbers 541 and 542?
Answer: 32 mm

Question: what is the works number of the only item built in 1882?
Answer: 283