High school cafeteria
Set some matrix elements to zero
Detect a number and replace with two NaN's
Say something funny
Number of odd and even elements within matrix
Whole Number Un-Concatenator
Airline Ticket Mod7 Checksum
Whole Number Concatenator
Dudeney Numbers: Numbers which are the cube of their decimal sum
Factorions: Numbers that equal the sum of the factorials of their digits
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