Question

find the hcf of 320,420 and 180
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Answer 1

Answer:

20

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Answer 2

Here is your answer

Decompose all numbers into prime factors

Prime factors of 180=22 . 32 . 5Prime factors of 320=26 . 5Prime factors of 420=22 . 3 . 5 . 7

Prime factors of 180=22 . 32 . 5Prime factors of 320=26 . 5Prime factors of 420=22 . 3 . 5 . 7

HCF = 20

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