Singapore lang say is 1 jiu shi 1. cos we very guai lan.

The answer is 1!!!

Serene Tan! It's 1!!

Or for the least the singapore maths education tells us to solve it into 1!

Roar.

But aiya, actually I accept the fact why people answer 9.

Nevertheless, 1 is the answer.

Very apparent what. How can another 1.5 million people all answer wrongly???

So must be to do with theory lo.

So peace k.

I insist my answer is 1. Hahaha.

Crazy question.

And and. the video say the question should be set inside harvard uni de entrance paper. LOL. Should try cambridge uni? Since our maths paper is cambridge one.

Hmmmmmmmmm.

If cambridge say 1 and harvard say 9, then should be quite funny liao.

Hohoho. I support cambridge! Too much british influence..

:D