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
-
Sum of diagonal of a square matrix
1563 Solvers
-
Find third Side of a right triangle given hypotenuse and a side. No * - or other functions allowed
178 Solvers
-
719 Solvers
-
339 Solvers
-
Highly divisible triangular number (inspired by Project Euler 12)
105 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!