Courtesy Math With Bad Drawings:

Courtesy Math With Bad Drawings:

The news clip below shows why, when I allow my students to use a 3×5 card on an exam, I specify — “that’s in inches. It must be handwritten. And no magnifying glasses.”
I don’t know about you, but this happens in my office every semester:
Source: https://www.facebook.com/BruceLeeFandom/videos/381821922152590/
Courtesy Bedtime Math: