Kao svoju posljednju četverodimenzionalnu konstrukciju, Karlo je ponovno počeo razmišljati o
hiperkocki.
Karla sada konkretno zanima, koliko različitih hiper-pravokutnika (hiperkocaka koje nemaju nužno sve stranice jednakih duljina) se nalazi u hiperkocki koju promatra.
Note: hiper-četverokuti s, naprimijer, dimenzijama 
i 
se uzimaju kao isti hiper-četverokut.
As his final four-dimensional construction, Karlo once again began thinking about a
hypercube.
Karlo is specifically interested in the following: how many distinct hyper-rectangles (hypercubes which do not necessarily have all edges of equal length) are contained within the hypercube he is observing?
Note. Hyper-rectangles with dimensions, for example, 
and 
are considered the same hyper-rectangle.
[lang=hr]
Kao svoju posljednju četverodimenzionalnu konstrukciju, Karlo je ponovno počeo razmišljati o $10 \times 10 \times 10 \times 10$ hiperkocki.
Karla sada konkretno zanima, koliko različitih hiper-pravokutnika (hiperkocaka koje nemaju nužno sve stranice jednakih duljina) se nalazi u hiperkocki koju promatra.
Note: hiper-četverokuti s, naprimijer, dimenzijama $1\times 2 \times 3 \times 4$ i $2 \times 1 \times 4 \times 3$ se uzimaju kao isti hiper-četverokut.
[/lang]
[lang=en]
As his final four-dimensional construction, Karlo once again began thinking about a \(10\times 10\times 10\times 10\) hypercube.
Karlo is specifically interested in the following: how many distinct hyper-rectangles (hypercubes which do not necessarily have all edges of equal length) are contained within the hypercube he is observing?
\textbf{Note.} Hyper-rectangles with dimensions, for example, \(1\times 2\times 3\times 4\) and \(2\times 1\times 4\times 3\) are considered the same hyper-rectangle.
[/lang]
