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If least prime factor of a is 3 and the least prime factor of b is 7 , what is the least prime factor of (a+b)

Posted by Aman Bhatt 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Least prime factor of {tex}"a"{/tex} is {tex}3{/tex} and least prime factor of {tex}"b"{/tex} is {tex}7{/tex}
Therefore, sum of least prime factors of {tex}a\ and\ b = 3+7 = 10{/tex}
and least factor of {tex}10\ is\ 2{/tex}
Therefore, least factor of {tex}a + b{/tex} is also {tex}2{/tex}

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