Skip to main content
Dictionary
Store
Blog
World
Help
Advertise
Chat
System Status
Information Collection Notice
Trademark Concerns
reCAPTCHA Privacy
Terms of Service
reCAPTCHA Terms
Privacy Policy
Accessibility
Report a Bug
Data Request
Contact Us
Security
DMCA
© 1999–2026 Urban Dictionary ®
Mugs
Tees
Hoodies
Pro Customization
Create unique products with your own words and definitions
Preview
Personalize Your Design
Your Word
Your Definition
80/2 = 60. Ng's Theory is a very important mathematical theory developed by D&T teacher Mr Gordon Ng at La Salle Chollege in Hong Kong. He said during a lesson that 80 divided by 2 is 60, and said that again in another lesson. The students of Class 2G even wrote over 30 "proofs" of the theory.
Text fits
Save
Cancel