Multiple choice What is seiben + sechs? dreizehn fünfzehn achtzehn siebzehn Reveal answer Fill a bubble to check yourself A Correct answer Explanation Sieben means seven and sechs means six in German, so sieben plus sechs equals dreizehn (thirteen). Achtzehn is eighteen, fünfzehn is fifteen, and siebzehn is seventeen. The question has a typo in sieben but the answer is still clear.