After five years of retirement from mental calculation, Marc returned to participate in Calculation League in 2024. While Marc’s practice and accomplishments generally relate to “standard” tasks, he enjoys and emphasizes a variety of standard tasks, including multiplication (AxB), division, square roots and cube roots, calendar dates, and sum of squares. He even practices long roots, doing 30-digit square roots, as well as 20/10 divisions, and likes to practice alternative strategies (such as left to right multiplication) or formats (such as oral questions).
