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2014-12-16T22:27:02+05:30

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180670 =  18037 * 5 * 2

HCF(18067, 2937) :
18067 = 2937 * 6 + 445

2937 = 445 * 6 + 267

445 = 267 * 1 + 178

267 = 178 + 89
178 = 2 * 89

89 does not have any factors like 5 or 2.

So 89 will be the highest common factor of both.

1 5 1
2014-12-16T22:29:46+05:30
The factors of 180670 are:1,2,5,7,29,89,180670
The factors of  2937 are :1,3,11,89 , 2937
We have the HCF as 89

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finding 89 , 29 as factors - is it not some what difficult ?
yes, it was. but i used calculator
that is not expected in exams. so procedure has to be different.