Question

Express each number as a product of its prim
(1) 140
(ii) 156
(in) 382
Find the LCM and HCF of the following pain
roduct of the two numbers.
(0) 26 and 91
(i) 510 and 92
ind the LCM and HCF of the following in
ethod.
0 12, 15 and 21 (ii) 17,23 and 29​

Answer 1

Answer:

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Answer 2

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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