What numbering system uses only the numbers 0 and 1?

The numbering system that uses only the numbers 0 and 1 is called the binary system.

Binary is the simplest numeral system that uses two symbols: 0 and 1. It is the foundation of digital electronics and computer science. In the binary system, each digit represents a power of 2, starting from the rightmost digit which is 2⁰, the next one to the left 2¹, then 2², and so on. For example, the binary number 1011 can be calculated as:

• 1 × 2³ = 8
• 0 × 2² = 0
• 1 × 2¹ = 2
• 1 × 2⁰ = 1

When you add these values together (8 + 0 + 2 + 1), you get the decimal value of 11. This illustrates how the binary numeral system functions in converting to its decimal equivalent.