Test problem 21 is faulty.
It has been updated.
Test suite has crashed again plz fix
@ Nikolaos: are you sure it's the test suite and not a server error? If you get the following message, it is due to a temporary server problem, not a specific problem: "While evaluating the solution, the server encountered an error caused by temporary unavailability of MATLAB Service. Wait a few minutes for the MATLAB Service to return, and then rescore." If you are getting this error, simply try the problem again later or on a different day.
Find the two-word state names
Number of 1s in a binary string
How many digits are there?
Is this triangle right-angled?
Lights Out 6 - 5x5, 13 moves
Lights Out 15 - 5x5, broken buttons I
Lights Out 10 - 5x5, with wrapping, 6 moves
Temperature Conversion Utility (Strings)
Divisible by 7
Divisible by 12
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