# A significant milestone

My left half is often used in dividing money,
It's not round but square: hold Attila in fear!

My right half is often used in metric spaces,
Islands in borderlands, lakes in a state.

Together with and we're sweet,
Together without we're this post.

• I knocked this up in just a few minutes - hopefully it's not too bad. Jul 15, 2020 at 22:30
• Trying not to spoiler too much - How did you know when you were making the post that this would work? Jul 16, 2020 at 13:52
• @simonalexander2005 That's why I had to do it in just a few minutes, per my comment above. I realised suddenly that we were approaching that point, and rushed to make a fitting puzzle. Luckily I succeeded in time. Jul 16, 2020 at 13:54

You are:

100,000 (one hundred thousand)

My left half is often used in dividing money,

Many world currencies are divided into 100 (one hundred) smaller units (e.g. cents in a dollar, pence in a pound).

It's not round but square: hold Attila in fear!

100 is a square number (10x10). 'Hundred' sounds like 'Hun-dread' (Attila the Hun, dread = fear).

My right half is often used in metric spaces,

One thousand is often used in metric system measurements (e.g. 1000 grams in a kilogram; 1000 metres in a kilometre; 1000 millilitres in a litre).

Islands in borderlands, lakes in a state.

The Thousand Islands are on the US-Canada border; the nation state of Finland is known as the Land of a Thousand Lakes.

Together with and we're sweet,

Hundreds and thousands ('hundreds' and 'thousands' with 'and') are a sweet ice cream and confectionery topping.

Together without we're this post.

And this question is apparently post* number 100,000 ('hundred' and 'thousand' without 'and') on PSE - a significant milestone indeed (check the URL!).

NB 'Posts' on SE network sites include questions, answers, tag wikis, and the other various components that make up site content. We're still some way off the 100,000th question!

• Ooooh congrats to the site! :) Jul 15, 2020 at 23:03
• Also, rot13(uhaqerq tenaq vf n pnaql one) though that doesn't necessarily work with the "and" Jul 15, 2020 at 23:27
• Yep, you got it. A couple of corrections: I meant "state" as in "nation" (figure out which one); and post IDs also count tag wikis and other things, so we don't even have that many Q&A yet. Jul 16, 2020 at 6:12
• @Randal'Thor Noted, and corrected! :)
– Stiv
Jul 16, 2020 at 7:06