The HCF of both numbers is 1
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53 is already a prime number so its factors are 1 and 53. 53 does not go into 12 or 55. The only number that goes in all three is 1.
5 goes into 45 and 55
Only the 1 times table. 12 and 55 are coprime.
1, just 1.
12 goes into 12 one time.Every number goes into itself once.