Consider a spiral starting with the number 1 and moving to the right in a clockwise direction, below is an example of a 5 by 5 spiral and the diagonal is highlighted:(adsbygoogle = window.adsbygoogle || []).push({});

2122 23 2425

2007080910

19 060102 11

1805040312

1716 15 1413

The sum of both diagonals is 101.

if the spiral formed in the same way to 1001 by 1001, then what is the sum of both diagonals?

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# Sum of diagonals

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