Problem asks for palindromes starting at 1, but test cases start at 100.
Now it goes down to 10, but wouldn't single digits be considered palindromes as well?
Additional test cases were added and the description slightly enhanced.
Make a checkerboard matrix
Extract leading non-zero digit
Check that number is whole number
Find the dimensions of a matrix
Find the area of the four walls
Concatenate two strings
Find the square of the sum of the digits of a number
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