wahahahahah!
i noe how to solve the 4 by 4 alr!
but it is so hard & complicated lah.
i thnk if you ask me to teach you, i myself will get confused
like seriously!

hmmmm. tests tests and so many tests next week
DIE! :(
and common test is the week after
wth, no rest ar!

shall we have a B outing on tuesday? :D