Fragen aus Vorstellungsgesprächen für Business analyst, von Bewerbern geteilt
How many smaller cubes are completely invisible in a n*n*n rubic's cube?
n^3- 6n^2 The number of cubes are n^3(volume). The number of cubes exposing one or more sides( 6 *( n^2) - all cubes on the sides.) Number of invisible cubes are n^3- 6n^2 .
Isn't the answer none since the question says "completely invisible"? every unit is visible by at least one side so any sub cube (made of these units) has a portion exposed.
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