test is a given integer number is Happy of not?
answer 1 if yes or 0 is no
sorry for that.
Increment a number, given its digits
Set the array elements whose value is 13 to 0
Magic is simple (for beginners)
Will there be a new leader?
Is this triangle right-angled?
Tony's trick for duplicating an mx1 vector n times
remove nans fast
Convert vector datasets to plot with imagesc instead of scatter
provide the numerical answer to these number questions...
Is this number Munchhausen Narcissistic?
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