kagamihara-chan's answer to Help's Secondary 1 Maths Singapore question.

Ask ManyTutors
done 1 Upvotes
clear 0 Downvotes
kagamihara-chan
Kagamihara-chan's answer
92 answers (A Helpful Person)
:)
Another way would be to say because q were to be multiplied by an even number, and thus it became an even number greater than 2, thus it is even and it must be composite :D