“I do not call my art ‘mathematical art,’” Dr. Roelofs said in a video interview about a week later. “It’s art about mathematics. Every artist has a favorite subject, things you want to talk about.

Test your eyesight and number skills with a quick challenge: find the number '93' hidden among inverted '39's in just 8 seconds. This exercise sharpens attention to detail, boosts focus, and improves ...