"Those girls like dogs."
Translation:Tamte dziewczynki lubią psy.
"Tamci" is the word for plural masculine gender which contains only men. It means that even if "a dog" is masculine in singular (ten pies - ten mężczyzna), it is not in plural (tamte/te psy - tamci/ci mężczyźni). So you say: tamci profesorowie, tamci panowie, tamci chłopcy etc.
lunaexoriens is basically right, but I have to precise one thing: not "only men", but "at least one man". A group of 99 female doctors and 1 male doctor will use masculine personal plural as well.
Is dziewczyni not acceptable without the k ? I assumed the difference between older and younger girls was still valid in plural form or is that wrong?
It is valid. But while the plural of "dziewczynka" is "dziewczynki", the plural of "dziewczyna" is "dziewczyny".
Is there a difference between Te and Tamte? Both are accepted here but I thought Te was these and Tamte was those.
Yes, that is correct.
However, "tamte" is used a lot less often than "those".
Basically, [te/te/tamte] = [these/those/those]. So "those" can be interpreted as "te".
or the Tips & Notes for the skill "Demonstr." (click the icon and then the lightbulb button, at least in the web version).
But generally, yes, you're right.