find lcm and hcf of 90,144 by prime factor method
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Answer: LCM=2 x 2 x 2 x 2 x 5 x 3 x 3 = 720
HCF=2 x 3 x 3 = 18
Step-by-step explanation:
LCM: Divide 90&144 simultaneously by 2,2,2,2,3,3,5 one after the other.
HCF: 144=2 x 2 x 2 x 2 x 3 x 3
90=2 x 5 x 3 x 3
Common factors are: 2,3,3
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