Question

3. Find the LCM and HCF of the following integers by applying the prime factorisation
method.
(i) 12. 15 and 21 (ii) 17,23 and 29
(iii) 8,9and25​

Answer 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=

Answer 2

Answer:

LCM of 12 15 and 21 is if you try then it will help to you not for me and if you don't then reply

HCF maize highest common factor LCM means lowest common factor so now you will understand what is LCM and HCF so find out these four of your own

PLEASE MARK ME AS BRAINLIST PLEASE IT'S MY REQUEST TO U