Task-1. Take two composite numbers that
have total 15 factors in total and
represent it by factor tree
method. Afte

1 thought on “Task-1. Take two composite numbers that<br />have total 15 factors in total and<br />represent it by factor tree<br />method. Afte”

1. Answer:

   Using prime factorisation method:

   (i) 12, 15 and 21

   Factor of 12=2×2×3

   Factor of 15=3×5

   Factor of 21=3×7

   HCF (12,15,21)=3

   LCM (12,15,21)=2×2×3×5×7=420

   (ii) 17, 23 and 29

   Factor of 17=1×17

   Factor of 23=1×23

   Factor of 29=1×29

   HCF (17,23,29)=1

   LCM (17,23,29)=1×17×23×29=11,339

   (iii) 8, 9 and 25

   Factor of 8=2×2×2×1

   Factor of 9=3×3×1

   Factor of 25=5×5×1

   HCF (8,9,25)=1

   LCM (8,9,25)=2×2×2×3×3×5×5=1,800

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