Feb 16, 2018 · I was looking around on the internet until I stumbled upon this equation. $$111111111\\times111111111 = 12345678987654321$$ How does this actually work? It is quite amazing how the number ascend and

Jan 20, 2017 · Consider the product. $$9\cdot123456789=1111111101.$$ This pattern is due to the fact that $9$ is one less than the basis of the numeration so that the products with individual digits (from the right $81,72,63,54\cdots$) have an …

May 20, 2013 · Many years ago, I noticed that $987654321/123456789 = 8.0000000729\\ldots$. I sent it in to Martin Gardner at Scientific American and he published it in his column!!! My life has gone downhill si...

Sep 14, 2011 · As to multiplication, both addition and multiplication are just some operations that map two elements to one element. I think you can define any operations on a set to be addition or multiplication. As long as the operations respect the laws you get from arithmetic because of the "Principle of Permanence".

I'm trying to figure out how to solve these types of repeating number sequence problems. Here is one I made up: Consider the following repeating number sequence: {4, 8, 15, 16, 23, 42, 4, 8, 15, 1...

Oct 20, 2012 · arithmetic; Share. Cite. Follow edited Oct 20, 2012 at 10:36. Américo Tavares. 39.1k 13 13 gold badges ...

Feb 28, 2022 · First, let's do 3 times 0.5, which we'll treat as 0.5 + 0.5 + 0.5. But instead of thinking of it happening all at once, imagine we take 3 seconds, and in the first second we move from 0 to 0.5, in the second second we move from 0.5 to 1.0, and in the third second we move from 1.0 to 1.5, and then we're finished and see our answer is 1.5.

$\cong$ is used to show a congruency between two mathematical expressions, which could be geometrical, topological, and when using modulo arithmetic you can get different numbers that are congruent, e.g., $5 \text{ mod } 3 \cong 11 \text{ mod } 3$ (although this is also written as $\equiv$). In LaTeX it is coded as \cong.

Dec 9, 2010 · I am finding with some formulas for my web application. I need a formula that counts the number of values between two number, e.g. there are four numbers (3,4,5,6) between 2 and 7

arithmetic; infinity; Share. Cite. Follow edited Mar 7, 2014 at 9:48. Willie Wong. 74.7k 13 13 gold badges ...