Based on the provided reference, Elon Musk appears to have been strong in math (and physics) during his schooling, though not necessarily the absolute top student.
Here's a breakdown of what we can infer:
- Academic Strengths: The reference states, "he would score really good in phy and math." This suggests a high level of competence in these subjects, sufficient to achieve very good grades.
- Comparative Performance: While good at math, the reference also notes, "There were some 5 to 6 brilliant students. And Elon was NOT among them." This indicates that while he excelled, others may have demonstrated an even greater aptitude.
Therefore, the reference suggests that while Elon Musk likely possessed a strong mathematical ability, it might not have been at the very pinnacle compared to his peers.