J james7878 New member Joined Jan 9, 2020 Messages 1 Jan 9, 2020 #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.

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.

H HallsofIvy Elite Member Joined Jan 27, 2012 Messages 6,636 Jan 9, 2020 #2 A prime number's only factors are 1 and itself. Since X+ 36 obviously isn't 1, X must be 1.