What is this digit operation?
0 -> 0
1 -> 9
121 -> 9
44 -> 6
15 -> 5
1243 -> 7
Encode Roman Numerals
Arrange Vector in descending order
Return area of square
07 - Common functions and indexing 6
Without the French accent please!
Rank of magic square (for beginners)
Narcissistic number ?
Find indices of diagonal elements
Replicate elements in vectors
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