Latest edition of NCERT Class 9 Maths Chapter 1 Number System is available here. Download the full chapter in PDF format along with the accurate NCERT Solutions for the chapter.

Chapter 1, Number System is one of the important chapters of Class 9 NCERT Textbook. Concepts given in this chapter are frequently used in other chapters of Class 9 Maths.

They require users to understand these quantities before being able to engage with the underlying mathematical structure of this base-10 system.

How was maths discovered? Who made up the numbers and rules? – Bianca, age 12, Strathfield, Sydney. We are all born with a brain that understands maths.

Almost 30 years ago, a group of Kaktovik students invented a numbering system that reflected the way they counted in Iñupiaq and made math more intuitive for them. Soon, anyone in the world will ...

The natives of a remote Polynesian Island invented a binary number system, similar to the one used by computers to calculate, centuries before Western mathematicians did, new research suggests ...

Imaginary numbers play a crucial role in mathematics because for many problems, they’re easier to work with than real numbers. But proving that elliptic curves are modular over imaginary quadratic ...

The math works perfectly in each case. In the usual decimal system, the number 17 (that is, a 1 followed by a 7) indicates that you have to calculate 10 + 7 × 1 (17 = 1 × 10 + 7 × 1).

Recent progress on the “sum product” problem recalls a celebrated mathematical result that revealed the power of miniature number systems.

George Szpiro enjoys a history of the slow but irresistible rise of mathematical symbols.