The Dot That Changed Math #shorts @Vsauce2

Uploaded December 2021 | Updated September 2026, 2 weeks ago

Where would we be with this dot?! It doesn't seem like much, but it's a critical element to our quick understanding of numbers. Without a decimal point or radix point, we have to mentally solve a little puzzle to figure out what the numbers we see actually mean. But with it, we know exactly what numbers we're looking at, and we know it instantly. And thanks to the printing press, we got rid of the line that just... wasn't very good at communicating what we needed to know. Decimals!

#shorts

The Best 0,1,2,3,4,5,6,7,8,9 Combinations #shorts

This Irrational Hypotenuse Got a Man Killed #shorts

$123!’s Zeroes Trick #shorts You can determine the number of trailing zeroes on a factorial of ANY size with a pretty simple trick that involves dividing by powers of 5. First, you can do it the hard way, and multiple every number of x! (x * (x - 1) * (x - 2)...) until youre multiplying by 1 at the end, and then just count up the zeroes. Or... you can do it the smart way. Divide your original number by 5, then 5^2, then 5^3, and when youve got a fractional value, stop and add up the rounded-down whole numbers. And BAM! Thats how many trailing zeroes x! has. It really is that easy, even for a 206-digit number like 123! #shorts$