To respond, you need to tell the person how many pencils you have. For example:
* "Tengo dos lapices." (I have two pencils.)
* "Tengo cinco lapices." (I have five pencils.)
* "No tengo lapices." (I don't have any pencils.)
* "Tengo muchos lapices." (I have many pencils.)
You can also respond with a question:
* "¿Cuántos quieres?" (How many do you want?)
* "¿Para qué?" (What are they for?)
Let me know if you'd like to practice with some other Spanish phrases!