how many numbers from 2 to 11 are exactly divisible by 2 ?
"2 / 2 = 1 and 11 / 2 = 5 5 - 1 = 4 4 + 1 = 5 numbers . answer : c"
add(divide(subtract(multiply(floor(divide(11, 2)), 2), multiply(add(floor(divide(2, 2)), const_1), 2)), 2), const_1)