"Seven is a number."

Translation: Siedem to liczba.

[saucoide]

siedem jest numerem? siedem to numer?

[Martin900554]

I answered correctly and it said I was wrong??

[Jellei]

That happens sometimes, unfortunately. Although perhaps you made some typo and didn't notice, that's also possible.

[ErnstMosch1]

please correct the sentence to siedem to liczba. "Mark the correct meaning" siedem jest liczbą is the right answer.