Chapter 1 (Integers) of Class 7 Maths NCERT Book (PDF) is available here for download in PDF format. Download and prepare for CBSE Class 7 Maths exam. It is one of the most important chapters of CBSE ...

Let A be a subset of integers (or a subset of a finite abelian group); in this communication, we survey some results related to the properties of the set A from the information on cardinality of 2A or ...

A new proof illuminates the hidden patterns that emerge when addition becomes impossible. The simplest ideas in mathematics can also be the most perplexing. Take addition. It’s a straightforward ...

The original version of this story appeared in Quanta Magazine. The simplest ideas in mathematics can also be the most perplexing. Take addition. It’s a straightforward operation: One of the first ...