O/L past papers › 2019
English medium · held December 2019
All 42 questions from Paper I and Paper II, with what each one tests. Try any of them free in Gedara Sir to check your answer, with step-by-step working.
Customs duty as a percentage of an item's value
Answer: Rs 540
💡 What it's asking: The duty is just 9% of the value.
✅ 10% would be 600, so 9% should be a little less: 540 fits.
බද්ද යනු වටිනාකමෙන් 9% පමණි.
Factorise a monic trinomial
Answer: (x + 5)(x - 2)
💡 What it's asking: We need two numbers that multiply to −10 and add to 3; they go into the brackets.
✅ Expand: x² − 2x + 5x − 10 = x² + 3x − 10. Correct.
ගුණිතය −10 ද එකතුව 3 ද වන සංඛ්යා දෙකක් අවශ්යයි; ඒවා වරහන්වලට යයි.
Base angle of an isosceles triangle from the apex angle
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