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The H.C.F. of two consecutive numbers is always 1.

1. 2,3
2. 4,5
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SCS means highest common factor

consecutive prime numbers don't have any factor except 1 so there scf will always be one

for example
take the HCF of 3 and 5
you will find one
same way if you will take the HCF of any consicitibe prime number you will always find 1

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