what is the total number of integers between 100 and 500 ( exclusive ) that are divisible by 5 ?
105 , 110 , 115 , . . . , 490,495 this is an equally spaced list ; you can use the formula : n = ( largest - smallest ) / ( ' space ' ) + 1 = ( 495 - 105 ) / ( 5 ) + 1 = 78 + 1 = 79 answer is c
add(divide(subtract(500, 100), 5), const_1)