An old gem

The Mathematical Gazette 2026

View at publisher
Authors: Prithwijit De
DOI: 10.1080/00255572.2025.2606563
Cited by: 0

Abstract

A few days ago, my friend sent me the following message over cell phone:‘I observed that any two-digit number ending with the digit 9 has the following property: The number is equal to the product ...

Fields of Study & Subjects

Mathematics and Applications Advanced Mathematical Theories History and Theory of Mathematics

Publication details

Journal / source
The Mathematical Gazette
Pages
1–4
Publication date
29 January 2026
Language
EN