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Sat 14 May, 2005 11:26 am
-----------N
---------N I N
-------N I A I N
-----N I A R A I N
---N I A R B R A I N
-----N I A R A I N
-------N I A I N
---------N I N
-----------N
How many ways can you read BRAIN off the diamond, using only letters that touch each other?
Shouldn't this be in the mathematical forum Whim? My brain gave up the struggle at about 15
No, why? It's a normal puzzle.
whim
Code:4 choices for R
2 choices for A that move toward an edge
2 choices for I
2 choices for N
1 choice for A that moves toward a vertex
2 choices for I that move toward an edge
2 choices for N
1 choice for I that moves toward a vertex
3 choices for N
4*(2*2*2 + 1*(2*2 + 1*3)) = 4*(8 + (4 + 3)) = 4*15 =
60
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