Fun Tasks
# Why We Can't Divide by Zero?

It is universally accepted that dividing by zero is a mathematical no-go. But have you ever wondered why? Let's explore this rule and break it down in simpler terms.
First, let's talk about what it means to divide a number by another number. Let's call it X.
Dividing by X is the same as multiplying by a special number, which we'll call X^{-1} such that X · X^{-1} = 1. For example, we could not divide by two if there were no number 2^{-1} = 1/2.
Now, let's explore the exceptional case of X = 0. If we were to allow division by 0, then, by following the same principle as mentioned above, we would need to introduce a new number when 0^{-1} such that 0 · 0^{-1} = 1. But when we look closer, we realize something strange because, from algebra, we know that any number multiplied by 0 is 0. So, we have 0 · 0^{-1} = 0. But, considering our initial premise that 0 · 0^{-1} = 1, we are faced with the curious conundrum of 1 = 0.
It gets even more perplexing. Let's assume Y to be any arbitrary number. With the premise 1 = 0, we find
that:

Would you like to book private or group online lessons?

Private Lessons | | | Group Lessons |

Y = Y · 1 = Y · 0 = 0

This tells us that every number Y is the same as 0. Imagine working with numbers in math if all you could use is 0.

To put it in simpler terms, think of it like Henry Ford's famous saying about his cars - you could get them in any color, as long as it was black. Just like how one color doesn't really give you many choices, dividing by 0 doesn't give us a useful answer. So, to avoid all this confusion and these strange outcomes, mathematicians made a rule: no dividing by 0! This keeps our math nice and logical.Number theory is a branch of mathematics that studies integers and their properties. It explores the fundamental principles of whole numbers, their divisibility, prime factorization, and relationships among them. Number theory plays a crucial role in cryptography, algebra, and various areas of mathematics, providing a foundation for understanding the properties and behavior of integers.

Would you like to book private or group online lessons?

Private Lessons | | | Group Lessons |