Is it der, die or das Kubus? – der Kubus, plural die Kuben

Why is it der Kubus?

No ending, compound or meaning rule gives away the article of Kubus, so learn the two together: der Kubus.

Sense 1

der

[1] Geometry: cubes

[2] Algebra: The third potency of a number, the number high 3, for example 2 × 2 × 2

[2] Algebra: die dritte Potenz einer Zahl, die Zahl hoch 3, zum Beispiel 2 × 2 × 2

[1] The limits of the courtyard form an exact cubus
[1] Die Begrenzungen des Innenhofes bilden einen exakten Kubus.

[2] “Every whole number can be
[2] „Lässt sich jede ganze Zahl

More source examples (19)

These dictionary examples can include historical and less common uses.

n
n

≢
≢

±
±

4
4

((
(

mode
mod

9
9

)))
)

{\ DisplayStyle N \ Equiv \ pm 4 {\ pmod {9}}}
{\displaystyle n\not \equiv \pm 4{\pmod {9}}}

as a sum of three integer cubes presented "
als Summe dreier ganzzahliger Kuben darstellen?“