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Question
Show that the following pairs are co-primes:
385, 621
Sum
Solution
The given numbers are 385 and 621.
385 = 5 × 7 × 11 × 1
621 = 3 × 3 × 3 × 23 = 33 × 23 × 1
∴ HCF = 1
Hence, they are co-primes.
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