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 the least prime factor of(a+b) is
a.2
b.3
c.5
d.8
PLZZ explain it also
a.2
b.3
c.5
d.8
PLZZ explain it also
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Odd + odd = even for sure. So for a+b we have 2 as a prime factor.
Since 2 is the smallest prime, answer is 2.
Here is your answer
Positive integers = a and b
Least prime factor of a = 3
Least prime factor of b = 5
Least prime factor of a+b = Odd+Odd =Even =2
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