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MathNet 2021 — Part 09 Question 81

Math Olympiad Vault · MathNet 2021 — Part 09

Question 81

Each of the 12 edges of a cube is labeled $0$ or $1$. Two labelings are considered different even if one can be obtained from the other by a sequence of one or more rotations and/or reflections. For how many such labelings is the sum of the labels on the edges of each of the 6 faces of the cube equal to $2$?
  1. $8$
  2. $10$
  3. $12$
  4. $16$
  5. $20$