Problem: how many unique positive odd integers less than 70 are equal to the product of a positive multiple of 5 and an odd number ?
Rationale: "the question basically asks how many positive odd integers less than 70 are odd multiples of 5 so we have 5,15 , 25,35 , 45,55 and 65 = 7 ans b"
annotated_formula: divide(divide(70, 5), const_2)