Problem: how many prime numbers are between 28 / 3 and 86 / 6 ?
Rationale: "28 / 3 = 9 . xxx 86 / 6 = 14 . xxx so we need to find prime numbers between 9 ( exclusive ) - 13 ( inclusive ) there are 2 prime numbers 1113 hence answer will be ( b ) 2 b"
annotated_formula: floor(const_2)