Any mathematically capable person

a triangle is called scalene if no two sides are the same length. the number of scalene triangles whose vertices are the vertices of a given cube is
a. 8
b. 18
c. 24
d. 36
e. 40

the answer is 24. first of all i don't understand the qs so apart from explaining the answer it'd be good to also understand the qs

There are six faces on a cube

Take one face

There are four corners that can be used as verices

4 scalene triangles can be drawn inside the face using each corner as a vertice

To prove it for yourself, just sketch a square and make 4 triangles using the corners as vertices of different size sides

[Actually 4 congruent triangles can be drawn as well]

4 x six faces = 24

There are six faces in a cube take two parallel faces its bisecting plane . Take two diagonally opposite points on one face. Join with the vertices on the opposite face one at a time to get 2 scalene triangles. Similarly take the other face diagonal. It will give you two more scalene triangle. i.e 4 scalene triangles per face .
For six faces we shall have 4×6=24 scalene triangles

Mathematics Capable of being expressed as a quotient of integers. n. Mathematics ... 4. endowed with the capacity to reason; capable of logical thought man is a rational being. 5. ... real, real number - any rational or irrational number ...