Prime number question

james7878

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Joined
Jan 9, 2020
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1
Hello all, i'm trying to help with my son's homework who's in 6th grade and still unable to figure it out. Any help will be much appreciated:


The whole number X is such that X * (X +36) is a prime number. Find the prime number.
 

HallsofIvy

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Jan 27, 2012
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5,641
A prime number's only factors are 1 and itself. Since X+ 36 obviously isn't 1, X must be 1.
 
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