# How do you translate "in denen Zweierzahlen stehen" to English?

Can you help me translate the phrase in the title? It refers to finding numbers having a certain characteristic, but I don't know which one: numbers with 2 digits, numbers that are multiples of 2, numbers that have one of the digits 2...

The entire phrase is: "Male in dem Fisch die Fächer farbig aus, in denen Zweierzahlen stehen." It's a math problem for kids. There's a drawing with a fish with little squares showing numbers inside.

• Could you please quote the entire sentence (before "...in denen"), and the source (book/webpage...)? It is hard otherwise to determine the exact intended meaning, since this is a term of art, not a word from everyday language. Context is king! Commented Feb 10, 2023 at 12:26
• @marquinho Thank you, I've edited the post. Commented Feb 10, 2023 at 12:34
• I would have expected in denen die Zahl zwei steht. It shouldn't be multiples of two, since gerade Zahlen is far better established for that purpose.
– guidot
Commented Feb 10, 2023 at 12:47
• This seems to be math terminology that is only used in Grundschule. After googling I think that those are indeed multiples of two. Commented Feb 10, 2023 at 13:58
• My first guess would have been multiples of 2, as well. But at least occasionally binary numbers are called "Zweierzahlen". See for example "Bei den Binärzahlen (auch „Zweierzahlen“ genannt) ..." here or "Zweierzahlen heißen auch Dualzahlen oder Binärzahlen" here. Your best shot would probably be to look into what's taught around this specific exercise. Commented Feb 10, 2023 at 14:05