If 12 divides nnn and 25 divides nnn, which of the following must be true?
300 divides nnn
37 divides nnn (since 12+25=3712 + 25 = 3712+25=37)
1 divides nnn (since gcd(12,25)=1\gcd(12, 25) = 1gcd(12,25)=1)
−13-13−13 divides nnn (since 12−25=−1312 - 25 = -1312−25=−13)