To find the HCF of two numbers you first need to express them as the product of their prime factors. In this case you'd get:
45 = 3x3x5
60 = 2x2x3x5
The next step is to identify any common prime factors. In this case both numbers have a 3 and a 5 as a prime factor. Multiplying these together gives:
3x5 = 15
And so 15 is the HCF of 45 and 60.
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HCF is the highest common factor of two or more numbers. One such pair which has 60 as their HCF can be: 120 and 180.
The GCF is 12.
The GCF is 12.
The HCF of 60 is 60. But it's a factor as opposed to a common factor because there's only one number.
HCF is 60 and the LCM is 360