My youngest daughter told me x is 70 degrees, while y is 20 degrees. She does not know what z should be. No wonder, she is only in primary 6, and this question is for form 5. You know z is also 20 degrees? Congratulations, you will get 4 marks from Mathematics Paper 1 in the School Certificate Examinations. 
Not good at geometry? No problem. Can you calculate the selling price of the vase? And percentage profit? 4 marks.
Not good even at percentages? What about the least possible length of the metal wire? Another 2 marks.
That’s 10 marks altogether. And you think mathematics is hard?
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