how many numbers from 12 to 82 are exactly divisible by 6 ?
"option ' d ' 12 / 6 = 2 and 82 / 6 = 13 = = > 13 - 2 = 11 numbers"
add(divide(subtract(multiply(floor(divide(82, 6)), 6), multiply(add(floor(divide(12, 6)), const_1), 6)), 6), const_1)