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A and b are two positive integers such that the least prime factor of a is 3 and the least prime factor of b is 5 . Then find the least prime factor of



I think it will be the product of the least factors of the two integers i.e, 5×3=15 will be the least common factor of (a+b).
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if a be 4 and b be 6 the least factor of a is 2 and b is 3 then 2*3 = 6 but 4+ 6 = 10 . and 10 's least is 2
I think it should be 3.
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