101 Binary Watch

Posted on by Administrator Posted in Computer Science, Computing Concepts, Quizzes


A binary watch uses 18 LEDs to give the HH:MM:SS time using three binary numbers each consisting of 6 bits.

The following diagram can help you understand how to work out the time displayed on a binary watch:

Using the above diagram we can work out the actual time being displayed:

Your Task:


Can you tell what is the time displayed by each of the following binary watches:

HH:MM:SS: (view solution)
HH:MM:SS: (view solution)
HH:MM:SS: (view solution)

Did you like this challenge?

Click on a star to rate it!

Average rating 3.7 / 5. Vote count: 87

No votes so far! Be the first to rate this post.

As you found this challenge interesting...

Follow us on social media!


Other challenges you may enjoy...