made easy test series

Question

Q. The minimal function that can detect a 'divisible by 3'    8421 BCD code digit(representation is D₈ D₄ D₂ D₁ ) is given by

Answer 1

We should get 1 for following inputs.

0000

0011

0110

1001

For rest...we should get 0. 10 and above will be don't care. Use k-Map, you will have your answer.

Comments

can you please elaborate it in detail ?

---

In BCD representation...only 0-9 are valid numbers. Rest are invalid numbers. We take don't care for invalid numbers.

---

Thanks