The above numbers do not appear in sentence view, or in the Russian vocabulary list. Russian Simple Texts, Lesson 35.
I think this is just showing the general rule for number endings. Numerals like 6, 7, 13, 14, 24, 25 aren’t treated as vocabulary words by LingQ, so they don’t appear individually in the vocabulary list. If the numbers were written out in full (e.g. шестого), they would be words and could appear.
The -го entry in the last screenshot is therefore the useful part, as it shows the general genitive ending used with ordinal numbers, as in 6-го, 13-го, 24-го, 25-го.
@PageTurner91 That’s correct.