A Machine
| Details | |
|---|---|
| Joke ID | #16805 |
| Funny |    (1.1) |
| Rating |   (1.34) |
| Category | Other / Misc |
| Submitted By | Animal    |
| Corrected By |
evil996  |
| Special |
Add To My Favorites |
| Rate Joke | |
|---|---|
(48 votes so far)
| |
|
I have a machine which has four cog wheels in constant mesh. The largest cog has 72 teeth and the others have 36, 25 and 15 respectively. How many revolutions must the largest cog make before each of the cogs is back in its starting position?
25 revolutions.
