how many even multiples of 55 are there between 549 and 1101 ?
"550 = 10 * 55 1100 = 20 * 55 the even multiples are 55 multiplied by 10 , 12 , 14 , 16 , 18 , and 20 for a total of 6 . the answer is b ."
add(divide(subtract(1101, 549), multiply(55, const_2)), const_1)