England, Wales, Scotland and Northern Ireland also participated as separated entities, showing the worst result for Wales which in mathematics was 43rd of the 65 countries and economies.
英國、威爾士、蘇格蘭和北愛爾蘭也作為獨立實體參加，顯示威爾士的最壞結果，在數學上是65個國家和經濟體中的43個。