threelonmusketeers to

Unexpected Factorial@sopuli.xyzEnglish · 5 days ago

51 is divisible by 3!

7

97

51 is divisible by 3!

threelonmusketeers to

Unexpected Factorial@sopuli.xyzEnglish · 5 days ago

7

Source: https://lemmy.blahaj.zone/comment/10788469

Chat

southsamurai
link
fedilink
English
arrow-up
7
arrow-down
1·
4 days ago
Pfft, amateur hour. I count to eleven without taking my shoes off all the time.

Just not at my kid’s school any more.

Unexpected Factorial@sopuli.xyz

unexpectedfactorial@sopuli.xyz

You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: [email protected]

When you use an exclamation mark with a number, you’re actually implying it’s not a normal number any more. It’s a factorial!

Ok, so how does this work?

5!=1×2×3×4×5=120

6!=720

These numbers get really large. For example:

15!≈1.3×10^12

So, next time you see a headline with 2000! in it, you’ll know what to expect.

There are also double factorials (n!!) and iterated factorials (n!)!, and they aren’t the same thing. Just add more exclamation marks and you get multifactorial. Check wikipedia to see how spicy it gets.

Visibility: Public

This community can be federated to other instances and be posted/commented in by their users.

1 user / day
122 users / week
128 users / month
257 users / 6 months
5 local subscribers
112 subscribers
8 Posts
13 Comments
Modlog

mods:
Hamartiogonic@sopuli.xyz