A point charge q lies at one corner of an imaginary cube. Find the flux penetrating each of the three faces that join at the corner where the charge is located and the flux penetrating each of the other three faces .

The total flux through cube is Q/8€o and electric field line passing tangentially to the face that join the corner so flux through these is zero. And due to symmetry flux through each another three face is Q/24€o.Hope it clears. If u have doubts then please clearify. And if u like my answer then please approve answer