At high school in Arnhem, I was extremely poor at arithmetic and algebra because I had, and still have, great difficulty with the abstractions of numbers and letters. When, later, in stereometry [solid geometry], an appeal was made to my imagination, it went a bit better, but in school I never excelled in that subject.
Sa mataas na paaralan sa Arnhem, ako ay labis maralita sa arithmetic at algebra dahil ako had, at mayroon pa rin, magaling na nahihirapan sa abstractions ng mga numero at titik. Kapag, mamaya, sa stereometry [solid geometry], isang apela ay ginawa sa aking imahinasyon, ito nagpunta ng kaunti ng mas mahusay, ngunit sa paaralan ko hindi daig sa na paksa.