Problem: how many unique positive odd integers less than 60 are equal to the product of a positive multiple of 5 and an odd number ?
Rationale: "the odd numbers less than 60 are 1 , 3,5 , . . . 59 some of them are equal to product of 5 and odd number hence odd multiples of 5 which are less than 60 are 5,15 , 25,35 , 45,55 ( total = 6 ) ; answer : b"
annotated_formula: divide(divide(60, 5), const_2)