Thread Closed

Numbers in Triangle Rows of 3 are equal rows of 4 are equal

 
Share Thread Thread Tools
Oct14-08, 06:09 PM   #1
 

Numbers in Triangle Rows of 3 are equal rows of 4 are equal


Ok I'm new here and I don't know how to find answers to puzzles.

I've got a few and my brain isn't working.

Picture a triangle with circles in it. Place the numbers 1-10 in the circles on the triangle so that the sum of Rows of 3 are equal and the sum of rows of 4 are equal

O
O O
O O O
O O O O

(If the picture of the triangle doesn't come out it 1 circle on top, then 2, then 3 then 4. The perimeter has 4 circles on all three sides.
 
PhysOrg.com
PhysOrg
science news on PhysOrg.com

>> 'Whodunnit' of Irish potato famine solved
>> The mammoth's lament: Study shows how cosmic impact sparked devastating climate change
>> Curiosity Mars rover drills second rock target
Oct15-08, 12:02 AM   #2
 
Just to help with the picture, try to code tag

Code:
      o
    o  o
  o  o  o
o  o  o  o
 
Oct16-08, 03:41 PM   #3
 
I believe there are 12 solutions to this, which are variants on 2 different patterns. You can rotate by 120 degrees and get a "new" solution effectively, or flip it along one of the 3 axes of symmetry-- giving you 6 variants on a single solution, and 12 patterns all together, since there are 2 "core" solutions.

Spoiler

Two of the variants on the core solutions are:
2
7 8
3 4 10
9 5 6 1

2
8 6
4 7 5
9 3 1 10


DaveE
 
Thread Closed
Thread Tools


Similar Threads for: Numbers in Triangle Rows of 3 are equal rows of 4 are equal
Thread Forum Replies
Count rows in Matlab Math & Science Software 10
Minimum boundary when dividing eqilateral triangle in 4 equal sized parts General Math 2
Equal areas in equal times Calculus & Beyond Homework 3
Triangular numbers, T(An +B), that equal (Cn+D)*(En+F) for all n Linear & Abstract Algebra 3
Determinant = volume using rows. Linear & Abstract Algebra 1