Math, asked by radhika6822, 2 months ago

3. Find the LCM and HCF
of the following integers by applying the prime factorisation
PI
method.
(i) 12, 15 and 21 (ii) 17, 23 and 29
(iii) 8, 9 and 25​

Answers

Answered by Gigasha
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

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