When Do the Three Hands of an Analog Clock Overlap?

Initializing live version

There is an interesting puzzle based on old-fashioned analog clocks.

Contributed by: Frederick Wu (October 2008)
Open content licensed under CC BY-NC-SA

Snapshots

Answer: This Demonstration solves this puzzle by finding the 12 times.

Snapshot 1: the first moment that the three hands overlap is at 0:0:0 or 12:00:00

Snapshot 2: the second moment is at 1:05:05

Snapshot 3: the last moment is at 11:59:59

Tip: The "static" option is for turning the three hands to any position you want.


Feedback (field required)

Email (field required)	Name

Occupation	Organization

Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback. Send