if integer k is equal to the sum of all even multiples of 25 between 200 and 600 , 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 50 between 200 and 600 . using arithmetic progression to find n : 600 = 200 + ( n - 1 ) 50 400 + 50 = 50 n 450 = 50 n = > n = 9 the sum would be : 9 * mean mean = [ 600 + 200 ] / 2 = 400 9 * 400 = 3600 d"
divide(add(divide(subtract(multiply(floor(divide(600, 25)), 25), multiply(floor(divide(200, 25)), 25)), 25), const_1), const_2)