Adwin Post on Fri, 10/01/2020 2:10am a) Ladder method 10 | 1080, 1350 3 | 108, 135 3 | 36, 45 3 | 12, 15 – | 4 , 5 LCM = 10 x 3 x 3 x 3 x 4 x 5 = 5,400 buttons b) Siti will need to buy 5 yellow packets and 4 green packets