Knowing that 123-45-67+89=100, write a function that gives this result for any order of the digits in the input. Otherwise, the function should give 'NaN'.
Increment a number, given its digits
Back to basics 6 - Column Vector
Use of regexp
Spot the outlier
Sum the numbers on the main diagonal
Alternate list of elements
Double the next!
Get the mean digit
Ratio between sum of primer numbers and non-prime numbers
Sum of a geometric series
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