Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

Edit: I stand corrected.

365.25 / 12 * 24 = 730.5

Technically it is 731 if you round up.



I find it hilarious that so many people are so worked up on the rounding on the third significant figure of a number in the comments section of an article about "back of the envelope estimation hacks".


Guess that's engineers for you


I used to think engineers would round to the nearest order of magnitude…


I did this exact calculation and it comes out to 730, exactly like GP said.


Since you're getting downvotes and several others have posted disagreeing, I'm posting to agree with 730.5. I also get 365.25 * 2 = 730.5. I have no idea why other people are saying this somehow comes out to exactly 730.

> Technically it is 731 if you round up.

Actually, since 365.25 is a bit high (if it were exact we would all still be on the Julian calendar), I would round down to 730 since the multiplication gives a little less than 730.5. But that's still not the same as saying the multiplication gives exactly 730, as others are saying.


No, that evaluates to 730. It's the same as 365*2=730.


The number of days per year is not exactly 365.


Other useful numbers:

Days in a year: 365.2425 (exactly, under Gregorian calendar)

Days in a month: 30.44 (approximation, a twelveth of the above)


365 * 2 = 730 :)


There aren't exactly 365 days in a year.


We understand nothing “exactly” in this universe, but this is a thread about estimation hacks so maybe cool it on the fun fact witch hunt.? Idk just a thought.


> We understand nothing “exactly” in this universe

Apparently a lot of "we" don't, since a number of people were saying they did the "exact" calculation that kolanos did but got a different answer.

> so maybe cool it on the fun fact witch hunt.?

The "witch hunt" seems to me to be on the part of the people who downvoted a perfectly correct and legitimate post, and those who responded to it with a claimed "exact" calculation that was wrong.




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: