"שלוש עשרה או שלושה עשר."

Translation: Thirteen or thirteen?

[YaakovZinberg]

It doesn't make sense to be translating this into English...

[NaftaliFri1]

Right. The point of the exercise is to point out that numbers have two forms, by gender.

[Dmitry_Arch]

The answer "Thirteen [feminine things] or thirteen [masculine things]" should be accepted