this is like my other post
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 :-) |
Posted by BMAD on 08 July 2013 - 04:13 AM
Posted by BMAD on 28 June 2013 - 04:36 AM
who can conquer the world with aching calves?
Posted by BMAD on 02 June 2013 - 04:35 AM
Posted by BMAD on 02 June 2013 - 04:34 AM
Posted by BMAD on 27 May 2013 - 04:05 AM
The 'best answer' will be awarded to the person who can develop an elegant method that does not utilize brute force or code.
Posted by BMAD on 27 May 2013 - 12:43 AM
We have two identical coins. And we roll the one on the left halfway around the other coin, so it rotates without slipping against the other coin, so that it ends up on the right of the other coin. It has rolled over a length of only half its circumference, and yet it has made one complete rotation. Which way is the head of the coin facing?
Posted by BMAD on 27 May 2013 - 12:42 AM
Would this approach work in identifying those that always lie and those that always tell the truth? Why or why not?
Posted by BMAD on 27 May 2013 - 12:25 AM
Start with any general quadrilateral, and connect the midpoints of consecutive sides, making an inscribed quadrilateral as in the diagram. That inscribed quadrilateral, in the diagram, seems to be a parallelogram. Let me conjecture that this inscribed quadrilateral is a parallelogram with half the area of the original quadrilateral. Can you prove or disprove either part of my conjecture?
Posted by BMAD on 27 May 2013 - 12:00 AM
Posted by BMAD on 26 May 2013 - 02:45 PM
A couple weeks ago, I created a question requiring the shortest path. Now for this question, assume that roads can be curved. We need a road that can pass through the following four cities (location of each city listed as coordinates): Los Angeles (3,4), Newport Beach (5,1), Pasadena (4,5), Santa Monica (2,3).
Posted by BMAD on 26 May 2013 - 05:04 AM
I think someone has an issue with me. I have been working hard to keep the forum questions alive but someone or maybe several people have gone through and have marked down every entry i have posted. This upsets me and makes me not want to continue participating here.
Posted by BMAD on 25 May 2013 - 11:13 PM
From now on, the "+" symbol no longer means to combine the count of objects (e.g. 3 things plus 4 things make 7 total things would not be modeled as 3 + 4 = 7).
Instead, the use of the + symbol is to show 5 + 3 = 7 to resolve the question of "how many spaces between objects are created when you line up five things and three things"
(ex: t _ t _ t _ t _ t _ t _ t _ t ) and this is now to be considered addition
If the other basic computational symbols maintained the same relationship to addition as they had before this new convention what would be the answers to the following problems?
4 - 3 = ?
3 x 3 = ?
9 / 3 = ?
sqrt (36) = ?
Posted by BMAD on 25 May 2013 - 10:52 PM
List out the numbers from 1 to 150 in a vertical column. Left align all of the numbers to where the leading digit of the number is directly on top of the next number's leading digit
(e.g. for the numbers 9, 10, and 11. 9 would be above 1 and that above 1 where zero would have nothing above it and 1 below it
ex.
...
9
10
11
...
)
remove the nothing space above all the numbers to where the numbers are shifted up until they are at the top creating a list of new numbers. With this new list of numbers what is the probability of randomly selecting 322? 99? and 140?
Posted by BMAD on 25 May 2013 - 09:28 PM
If three circles are mutually tangent where one has a radius of 3cm, another has a radius of 4cm, and the last has a radius of 5cm. What is the area of the region bounded between the three circles?
Posted by BMAD on 25 May 2013 - 09:25 PM
Community Forum Software by IP.Board 3.4.7
Licensed to: BrainDen