Problem 2340. Numbers spiral diagonals (Part 1)
Inspired by Project Euler n°28 et 58.
A n x n spiral matrix is obtained by starting with the number 1 and moving to the right in a clockwise direction.
For exemple with n=5, the spiral matrix is :
21 22 23 24 25 20 7 8 9 10 19 6 1 2 11 18 5 4 3 12 17 16 15 14 13
In this example, the sum of the numbers on the diagonals is 101.
What is the sum of the numbers on the diagonals in any n by n spiral (n always odd) ?
HINTS: You want the diagonals, not the whole matrix.
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers196
Suggested Problems
-
2902 Solvers
-
443 Solvers
-
Set the array elements whose value is 13 to 0
1351 Solvers
-
Create an index-powered vector
719 Solvers
-
Find the sides of an isosceles triangle when given its area and height from its base to apex
1843 Solvers
More from this Author43
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!