Write a function that concatenates whole numbers.
numcat(111,222) should return 111222
numcat(1,2,3,4,5) should return 12345
Find the sum of the elements in the "second" diagonal
Volume and area of a sphere
Count decimal digits of a number
Find a Pythagorean triple
Airline Ticket Mod7 Checksum
Find the first N zeros of the 666 function
Filter British English into American English
What is the nth step in Conway's Life?
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