Write a function that concatenates whole numbers.
numcat(111,222) should return 111222
numcat(1,2,3,4,5) should return 12345
Determine whether a vector is monotonically increasing
Number of Horns on a unicorn!
Find out missing number from a vector of 9 elements
Who invented zero?
02 - Vector Variables 3
Find the first N zeros of the 666 function
Factorions: Numbers that equal the sum of the factorials of their digits
Whole Number Un-Concatenator
Dudeney Numbers: Numbers which are the cube of their decimal sum
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