Let's Speak Polish - Numeral in Polish

1. Instrumental:

   • with one boy (by one boy): z jednym chłopcem
   • by one boy: jednym chłopcem
   • with one cat (by one cat): z jednym kotem
   • by one cat: jednym kotem

2. Locative:

   • about one boy: o jednym chłopcu
   • about one cat: o jednym koci

3. Vocative O! (for a boy):

   • Oh, one boy!: O, jeden chłopak!
   • Oh, one cat!: O, jeden kot!

4. This/that one (masculine singular):

   • This one boy: ten jeden chłopiec

5. This portrait is of this one boy.

   • Ten jest portretem tego jednego chłopca.

6. They gave it to this one boy.

   • Oni dali to temu jednemu chłopcu.

7. They gave it for this one boy.

   • Oni dali to dla tego jednego chłopca.

8. I couldn’t see this one boy then.

   • Nie widziałem tego jednego chłopca wtedy.

9. We will have some problems with this one boy.

   • Będziemy mieli problemy z tym jednym chłopcem.

10. They want it to be done by this one boy.

    • Oni chcą, żeby to było zrobione przez teego jednego chłopca.

11. They don’t want to talk about this one boy.

    • Oni nie chcą rozmawiać o tym jednym chłopcu.

12. Someone called out, "Oh, this one boy!"

    • "O, ten jeden chłopiec!" zawołał ktoś.

Regarding the key to the Control Tests, it is mentioned at the end of Section 8 in the text you provided. The numeral characterization, its declension through cases, and gradation are detailed in the following sections as listed.