....never know if it's singular or plural....
Anyway, from the BBC:
https://teakdoor.com/images/imported/2007/04/342.jpg
i) and ii) are pretty easy methinks - I can't remember iii) but maybe sin/cos or summit like that.
https://teakdoor.com/images/imported/2007/04/343.jpg
They may as well have wrote the questions in Chinese for all the sense they make to me.
From:
BBC NEWS | Education | Mathematicians set Chinese test