3. Find the LCM and HCF
of the following integers by applying the prime factorisation
PI
method.
(i) 12, 15 a

1 thought on “3. Find the LCM and HCF<br /> of the following integers by applying the prime factorisation<br />PI<br />method.<br />(i) 12, 15 a”

1. LCM and HCF are

   1) 12= 2×2×3

   15=3×5

   21=3×7

   HCF=3

   LCM= 2²×3×5×7

   =2×2×3×5×7

   =420

   2) 17= 1×17

   23= 1×23

   29=1×29

   HCF= 1

   LCM=17×23×29

   =11339

   3) 8= 2×2×2

   9=3×3

   25=5×5

   HCF=1

   LCM= 1800

   Reply