"Er kommt spätestens um acht."

[fashionp]

why can't it be "around 8"?

[amyb24]

Or "by 8"? In English, that would be pretty much the same, I think.

[FHemmes]

I did 'by eight' as well. I'm not a native English speaker, but I tend to think it would be correct.

[FisherLiz]

I think there is more emphasis here in the German than your English versions give. "Around eight" is certainly not right because it could mean a little before or a little after, and this guy is not coming after eight at all. "By eight" might be OK, but still isn't as firm as the German here.

[itsfaisi]

In one of the correct solutions 'eight' is wrongly spelled as 'eigh'

[dvdtknsn]

Yes, this has been incorrect for a while!!!