## Welcome to BrainDen.com - Brain Teasers Forum

 Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account. As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends. Of course, you can also enjoy our collection of amazing optical illusions and cool math games. If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top. If you have a website, we would appreciate a little link to BrainDen. Thanks and enjoy the Den :-)
Guest Message by DevFuse

# Another Kindergarten Problem

2 replies to this topic

Senior Member

• Members
• 1702 posts
• Gender:Female

Posted 12 March 2013 - 12:37 AM

I have a stamp in the shape  of a circle with a diameter of 4 inches and no special design.  I need to completely cover my 8.5 by 11 sheet of paper with this stamp completely.  I can only use the stamp to cover the sheet, so no dipping the sheet into the ink  ,

what is the least amount of times i could stamp this sheet and still completely cover it?

can you model that?

What is the most amount of times i could stamp the sheet if each successive stamp must be at least 1 inch away from the center of the previous stamp?

• 0

### #2 bonanova

bonanova

bonanova

• Moderator
• 5918 posts
• Gender:Male
• Location:New York

Posted 12 March 2013 - 12:55 AM

In the second question does the 1-inch spacing refer to center-center distance?

Or must the edge of a stamp's disc be > 1 in from the center of any previous stamp?

I think you mean the latter, but just to be certain, I'm asking.

Meantime, here's the ...

Spoiler for First part

• 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

Senior Member

• Members
• 1702 posts
• Gender:Female

Posted 12 March 2013 - 12:57 AM

In the second question does the 1-inch spacing refer to center-center distance?

Or must the edge of a stamp's disc be > 1 in from the center of any previous stamp?

I think you mean the latter, but just to be certain, I'm asking.

There are three questions but the third one is meant to be the edge  of the new stamp to the center of the previous circle.

• 0

#### 0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users