This was a fun problem, but I think lookup table solutions are possible given the way the way the test suite is configured. Maybe you could add a string parser to see if the test suite correct solutions are included in the answer code?
Renaming a field in a structure array
Are you in or are you out?
Regular polygon bounded by and bounding a circle
Increasing sub-sequence (Level 1)
Factorizing a number into a given number of factors
Mean number of letters per word (Easy)
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