what's the "str2num" mean?
str2num means "convert string to number"; even more cryptic is the fact that "str2num 1:10" is equivalent to "str2num('1:10')" (Matlab allows you to omit the single quotes and parentheses when using functions that take character strings as arguments).
Find the palindrome
How to subtract?
Number of digits in an integer
Times 3 problem
The Goldbach Conjecture, Part 2
Find the two-word state names
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