This paper deals with selected international rankings and their correlation with other rankings. Firstly, some methodological issues were explained.
Secondly, a correlation analysis of fifty randomly chosen ranks and the first fifty ranks of three leading rankings was carried out. Subsequently, a correlation analysis with other three rankings was carried out and the results were compared.
Results showed a strong correlation of the three leading rankings in case of randomly chosen ranks while the correlation was substantially weaker in case of the first fifty ranks, which raised some question concerning issues related to rankings' methodology. The correlation of other ranking was weak or moderate with two exceptions.