human
Identify factors of algebraic expressions Tom and Katie are discussing factors

Tom says \( 3 \) is a common factor of \( 18 x \) and \( 29 y \)

Katie says \( x \) is a common factor of \( 6 x \) and \( 9 y \)

Who is correct? Only
Tom
gpt
Thinks a factor of the final digit is also a factor of the whole number