Write a function that concatenates whole numbers.
numcat(111,222) should return 111222
numcat(1,2,3,4,5) should return 12345
The Goldbach Conjecture, Part 2
Clean the List of Names
Find state names that start with the letter N
The Answer to Life, the Universe, and Everything
Filter British English into American English
Factorions: Numbers that equal the sum of the factorials of their digits
Airline Ticket Mod7 Checksum
Whole Number Un-Concatenator
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