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 :-)
Posted 28 June 2009 - 06:40 PM
Posted 28 June 2009 - 07:51 PM
Each number in the pyramid is the sum of the two numbers immediately below it. Fill in the pyramid with the missing numbers.
Posted 28 June 2009 - 07:56 PM
Spoiler for simple math
you know steeleman23 already guessed that and that what I got too, but rohit said it was wrong.
Posted 28 June 2009 - 08:19 PM
Posted 28 June 2009 - 08:57 PM
Here's a more concrete solution based on my
previous postSpoiler for a more concrete answer
how is 29+28=56?
Posted 28 June 2009 - 09:02 PM
29 in base 11 is 2 times 11 plus 9;
Adding these, we get 4 times 11 plus 17
which is 5 times 11 plus 6 -- that's
56 in base 11.
Posted 29 June 2009 - 03:15 AM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users