Least Common multiple, LCM
L.C.M a) Find the greatest common divisor of the term. (1 mark) 144x3y2 and 81xy4 b) Hence factorise completely this expression 144x3y2-81xy4 (2 marks) The GCD of two numbers is 7and their LCM is 140. if one of the numbers is 20, find the other number (2mks) The LCM