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12 - Spot the law, general questions

 1. A * A = A
Note: In all these questions - simply spot and name the law 

  commutative

  idempotent

  distributive

  associative

 2. (A * B) * C = A * (B * C)

  commutative

  idempotent

  distributive

  associative

 3. A * B = B * A

  associative

  idempotent

  commutative

  distributive

 4. A * (B + C) = A * B + A * C

  idempotent

  commutative

  distributive

  associative

 5. A * 0 = 0

  DeMorgan's

  complement

  Absorption

  identity

 6. A + 1 = 1

  DeMorgan's

  Absorption

  complement

  identity

 7. A * ~A = 0

  identity

  complement

  Absorption

  DeMorgan's

 8. ~(A * B) = ~A + ~B

  identity

  complement

  Absorption

  DeMorgan's

 9. A + (A * B) = A

  Absorption

  DeMorgan's

  identity

  complement

 10. A + ~A = 1

  complement

  DeMorgan's

  identity

  Absorption

 11. A + 0 = A

  DeMorgan's

  complement

  identity

  Absorption

 12. A * 1 = A

  DeMorgan's

  complement

  identity

  Absorption

 13. A + (B * C) = (A + B) * (A + C)

  idempotent

  distributive

  associative

  commutative

 14. A + B = B + A

  commutative

  distributive

  associative

  idempotent

 15. (A + B) + C = A + (B + C)

  idempotent

  associative

  distributive

  commutative

 16. A + A = A

  idempotent

  distributive

  commutative

  associative

 17. (A + B) = ~A * ~B

  DeMorgan's

  Absorption

  identity

  complement

 18. A * (A + B) = A

  DeMorgan's

  Absorption

  complement

  identity

 19. (A + B) * (A + ~B) = A

  Absorption

  DeMorgan's

  identity

  complement

 20. A * (~A + B) = A * B

  DeMorgan's

  complement

  identity

  Absorption