Step:1 Since 420 > 130 we apply the division lemma to 420 and 130 to get ,
420 = 130 x 3 + 30
Step:2 Since 30 ≠ 0 , we apply the division lemma to 130 and 30 to get
130 = 30 x 4 + 10
Step:3 Since 10 ≠ 0 , we apply the division lemma to 30 and 10 to get
30 = 10 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this Step is 10, the HCF of 420 and 130 is 10.

1Thank You

Shrianshika Saini 6 years, 8 months ago

420=2.2.5.3.7 130=2.5.13 HCF=5 .Means multiply

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