how many integers between 1 and 1,800 are divisible by 20 , 30,40 ?
"lcm of the given numbers = 120 therefore , number of integers = 1800 / 120 = 15 option b is answer"
subtract(1,800, add(add(multiply(const_2, const_100), multiply(add(const_3, const_4), const_10)), const_2))