Create an n-by-n matrix with elements ranging from 1 to n^2 in a rectangular spiral pattern.
Example if n = 5 :
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
Find the numeric mean of the prime numbers in a matrix.
Find the palindrome
Volume of this donut
Who knows the last digit of pi?
Number of digits in an integer
Create a vector whose elements depend on the previous element
Set some matrix elements to zero
Fill a zeros matrix
Multiply 2 numbers
Create a matrix from a cell
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