Infographic: Which Countries Have the Best Math Skills? There's a perception that younger generations are worse at math. This is partially supported by the results of the PISA testing, administered by the Organisation for Economic Co-operation and Development (OECD) to 15-year-old students. However, as the infographic shows, this statement isn't true for all countries. The average OECD country score in numeracy in 2022 is 472, 15 points lower than in 2018. However