| Category | Answer | % Correct |
|---|---|---|
| Postcode areas with a one-letter abbreviation | Birmingham | Glasgow | Manchester | East London | Liverpool | North London | Sheffield | 93%
|
| Postcode areas that only cover land in Wales | Cardiff | Swansea | 79%
|
| Postcode areas that span both England and Wales | Chester | Gloucester | Hereford | Llandrindod Wells | Newport | Shrewsbury | Llandudno | 79%
|
| The only postcode area of Northern Ireland | Belfast | 71%
|
| Postcode areas with over 70 districts | Belfast | Birmingham | 64%
|
| Postcode areas containing an 'X' | Exeter | Oxford | Halifax | 57%
|
| Postcode areas where the first letter of the abbreviation does not match the first letter of the postcode area | Blackpool | Galashiels | Cleveland | Southall | Lerwick | 43%
|
| London-only postcode areas | West London | South West London | North London | North West London | South East London | East London | West Central London | East Central London | 36%
|
| Postcode areas that do not share a starting letter | Aberdeen | Falkirk | York | 21%
|
| Postcode areas that span both England and Scotland | Galashiels | Dumfries | 21%
|
| Postcode areas that span 6 different English counties | Gloucester | Leicester | Northampton | Oxford | Peterborough | 21%
|
| Postcode areas with 5 or fewer districts | Harrogate | Lerwick | 21%
|
| Postcode areas with fewer than 20 sectors | Llandrindod Wells | Lerwick | Hebrides | 21%
|
| Postcode areas with an average of over 10 sectors per district | Liverpool | 14%
|
| Postcode areas with over 300 sectors | Liverpool | Manchester | 14%
|