Find the sum of all the odd numbers in a matrix.
x = [2 3 5 7 1 4 11]
y = 27
Cell Counting: How Many Draws?
Basic arrays operations.
Duplicate a character
Deleting an element in a matrix
Alternately upper-lower case
interesting center of magic matrix
most frequent character
union without repitition
Find the index of n in magic(n)
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