perplexus.info :: Riddles : Life Cycle in Color

Home > Riddles

Life Cycle in Color (Posted on 2003-02-05)

It's black when it's not in use, it's red when it's in use, and it's grey when you're done using it. What can this be??

See The Solution Submitted by ...

Rating: 2.7857 (14 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

My Guess

| Comment 4 of 29 |

Is it charcoal?

Posted by E Woodford on 2003-02-06 04:47:05

Please log in:

Forums (1)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (6)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info