if integer k is equal to the sum of all even multiples of 35 between 280 and 630 , what is the greatest prime factor of k ?
"if we break down what the stem is asking what is the sum of all mult of 30 between 300 and 600 . using arithmetic progression to find n : 630 = 280 + ( n - 1 ) 35 350 + 35 = 35 n 385 = 35 n = > n = 11 the sum would be : 11 * mean mean = [ 630 + 280 ] / 2 = 455 11 * 455 = e"
divide(add(divide(subtract(multiply(floor(divide(630, 35)), 35), multiply(floor(divide(280, 35)), 35)), 35), const_1), const_2)