how many multiples of 5 are there between 1 and 89 ?
"5 multiples are 5 , 10,15 , - - - - - - - - - , 80,85 it should be mentioned whether 1 and 89 are inclusive . the answer is ( 85 - 5 ) / 5 + 1 = 17 answer is d"
add(divide(subtract(89, 1), 5), const_1)