4 , 12 , 48 , 240 , 1440 , 10080,80640 , 725760 ( . . . )
"explanation : go on multiplying the given numbers by 3 , 4 , 5 , 6 , 7,8 , 9,10 answer : option a"
subtract(negate(240), multiply(subtract(12, 48), divide(subtract(12, 48), subtract(4, 12))))