a and b are two positive integers such that the least prime factor of a is 3 and the least primw factor of b is 5. Then calculate the least prime factor of (a+b)
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a and b are positive integers
a least prime factor is 3
so it's odd becuase if it's even then its lowest prime factor would be 2
similarly b is also odd
now a and b are odd
we know that sum of 2 odd numbers in even
so a+b is even
so least prime factor would be 2
a least prime factor is 3
so it's odd becuase if it's even then its lowest prime factor would be 2
similarly b is also odd
now a and b are odd
we know that sum of 2 odd numbers in even
so a+b is even
so least prime factor would be 2
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