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O/L Maths 2011 Paper with Answers

අ.පො.ස. (සා/පෙළ) ගණිතය 2011 ප්‍රශ්න පත්‍රය සහ පිළිතුරු

The G.C.E. O/L Mathematics 2011 paper (held December 2011): all 47 questions from Paper I and Paper II, with what each question tests. Try any question free in Gedara Sir to check your answer and see step-by-step working in English and Sinhala.

Most marks in 2011 came from

Paper I, Part A

Paper I Part A Q1 · 1 marks

Direct Proportion

Price of one loaf from the price of eight

Paper I Part A Q1: Price of one loaf from the price of eight

Answer: Rs 9

💡 What it's asking: Same price for each loaf, so share the total equally.

  1. 1Total: Rs 72.
  2. 2Number of loaves: 8.
  3. 372 ÷ 8 = 9, so Rs 9 each.

✅ 8 × 9 = 72. Correct.

සිංහලෙන් විසඳුම

සෑම පාන් ගෙඩියකම මිල සමාන නිසා මුළු මිල සමව බෙදන්න.

  1. මුළු මිල: රු. 72.
  2. පාන් ගණන: 8.
  3. 72 ÷ 8 = 9; එකක් රු. 9.

Paper I Part A Q2 · 1 marks

Equations

Solve a one-step linear equation

Paper I Part A Q2: Solve a one-step linear equation

Answer: y = 5

💡 What it's asking: Which number, take away 5, leaves nothing? Undo the taking away.

  1. 15 is subtracted from y.
  2. 2Add 5 to both sides: y = 5.
  3. 3Check: 5 − 5 = 0.

✅ Substituting 5 gives 0, as required.

සිංහලෙන් විසඳුම

5 අඩු කළ විට බිංදුව ලැබෙන සංඛ්‍යාව කුමක්ද? අඩු කිරීම ඉවත් කරන්න.

  1. y න් 5 අඩු කර ඇත.
  2. දෙපසටම 5 එකතු කරන්න: y = 5.
  3. පරීක්ෂාව: 5 − 5 = 0.

Paper I, Part B

Paper II, Part A

Paper II, Part B

Paper II Part B Q9 · 10 marks

Midpoint Theorem · Congruency · Parallelograms II · Area of Plane Figures between Parallel Lines

Midpoint theorem, congruence, parallelogram, equal lengths and equal areas

Paper II Part B Q9: Midpoint theorem, congruence, parallelogram, equal lengths and equal areas🔒 Answer & steps: try it free in Gedara Sir→