Breakdown of Kennst du diese Zahl?
du
you (informal singular)
kennen
to know (somebody/something)
dieser
this / that (fem.: diese, neut.: dieses)
die Zahl
the number
Questions & Answers about Kennst du diese Zahl?
Why do we use kennst here instead of weißt for "know"?
In German, kennen means to be familiar with a noun—like a person, place, or a specific thing (such as a number). wissen is used for knowing facts or having information, usually followed by a question word or a whole clause. Because we are just asking about familiarity with a noun (diese Zahl), kennst is the right choice.
What is the difference between Zahl and Nummer?
Zahl is used for mathematical numbers, amounts, or quantities—like the large numbers you are learning now (100 or 1,000,000). A Nummer is used for labels or identification, like a phone number (Telefonnummer) or a flight number. Since we are asking about a numeric value here, Zahl is the correct word.
Why is the word for "this" written as diese?
The word for "number" is feminine (die Zahl). In this sentence, it is the direct object (the thing being known), which means it is in the accusative case. The feminine accusative ending for "this" is -e, making it diese.
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