Question

A polyhedron has 6 vertices and 9 edges. How many faces does it have?

Answer 1

From Euler equation
Vertices - Edges + Faces = 2
1.  F = E - V + 2
F = 9 - 6 + 2 = 5
answer is B

2. V = E - F + 2
V = 36 - 25 + 2 = 13
Answer is c