Respuesta :
Hello there! ;)
85 is a composite number as it has more than 3 factors. So Kai wrote a composite number on the board.
Prime numbers have only two factors - 1 and itself.
If a number's last digit is 5, it's 100% composite.
Hope this helps you!
~Just a joyous gal
#CarryOnLearning
Answered by
[tex]-SilentNature-[/tex]