What is this digit operation?
0 -> 0
1 -> 9
121 -> 9
44 -> 6
15 -> 5
1243 -> 7
Return unique values without sorting
Angle between Two Vectors
Given a matrix, return the last eigen value
Matrix to column conversion
Rounding off numbers to n decimals
Pandigital number n°3 (Inspired by Project Euler 32)
Numbers spiral diagonals (Part 1)
Find the path through the cell
Find indices of diagonal elements
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