HCF of 10 and 25 - 5, HCF of 6 and 9 - 3, HCF of 21 and 14 - 7, HCF of 21 and 42 - 21, HCF of 60 and 90 - 30, HCF of 48 and 72 - 24, HCF of 126 and 210 - 42, HCF of 30 and 45 - 15, HCF of 128 and 160 - 32, HCF of 525 and 600 - 75,

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