3. find the Lem and hef of 12,15 andh 2kyapplying the pacene factoce. eatial mothod 2x 2x 3 3 X5 2 x30 12 1S = 3X 7 Hcf= 3 Iem = 2 x 2 X 3X S-x7= 420 Qedifend the Lem and Hef 23 and2 q.L nobhod = 17 1717 X 23 1x 29. E23 = 29+ %3D 223 E Hef =d rem=1X17x99 X 29 X 23= 1137 %3D

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