The boy, who was registered under the pseudonym Un Pak, was sometimes in school only in the afternoons, said the newspaper, quoting an unnamed former classmate.
Not surprisingly then that Kim failed natural sciences with 3.5 out of 6, and obtained a just minimum passing score of four for mathematics, culture and society and German.
Even in English, where he was placed in an advanced class before being downgraded to an average one, he obtained the minimum pass grade.
Only in music and technical studies did he obtain 5.
This was despite the fact that Kim, who was born January 8, 1983, was in a class of children mostly born in 1985 due to his poor level of German — the main language used in the Swiss capital Bern.
Kim took over the reins of the hermetic country after his father Kim Jong-Il’s death on December 17, 2011