Ten-Year Series · PSLE 2021
PSLE Maths 2021 Answers
The answer key for the PSLE Maths 2021 papers (Paper 1, Paper 2): 47 questions, 45 with a free final answer, plus the topic and marks for each. Find the question number in your TYS book and tick it off.
We publish answers only. The questions and diagrams stay in your printed Ten-Year Series (TYS) book, so keep it open beside this page (“see the diagram in your book”).
MCQ answers are option numbers, e.g. (3).
Paper 1
30 questions · 28 free final answers · 45 marks listed
| Q | Answer | Topic / section | Marks |
|---|---|---|---|
| Q1 | (2) | Whole NumbersMCQ | 1 |
| Q2 | (2) | DecimalsMCQ | 1 |
| Q3 | (3) | DecimalsMCQ | 1 |
| Q4 | (4) | FractionsMCQ | 1 |
| Q5 | (4) | GeometryMCQ | 1 |
| Q6 | (1) | FractionsMCQ | 1 |
| Q7 | (4) | GeometryMCQ | 1 |
| Q8 | (4) | GeometryMCQ | 1 |
| Q9 | (3) | AlgebraMCQ | 1 |
| Q10 | (2) | AnglesMCQ | 1 |
| Q11 | (3) | FractionsMCQ | 2 |
| Q12 | (3) | Whole NumbersMCQ | 2 |
| Q13 | (1) | AnglesMCQ | 2 |
| Q14 | (4) | Whole NumbersMCQ | 2 |
| Q15 | (3) | PercentageMCQ | 2 |
| Q16 | 604 | Whole NumbersShort answer | 1 |
| Q17 | 1.13 | DecimalsShort answer | 1 |
| Q18 | 0.875 | DecimalsShort answer | 1 |
| Q19 | Q, R | GeometryShort answer | 1 |
| Q20 | 75 | MeasurementShort answer | 1 |
| Q21 | (a) 13/15(b) 1 7/50 | Fractions · DecimalsShort answer | 2 |
| Q22 | (a) e(b) b and d | AnglesShort answer | 2 |
| Q23 | 135 cm² | Area and PerimeterShort answer | 2 |
| Q24 | (a) A, D(b) D, 21 | Data AnalysisShort answer | 2 |
| Q25 | 1.32 ℓ | Fractions · MeasurementShort answer | 2 |
| Q26 | 22 cm | AlgebraShort answer | 2 |
| Q27 | Drawing / explanation in worked solution | Geometry · VolumeShort answer | 2 |
| Q28 | Drawing / explanation in worked solution | Area and Perimeter · RatioShort answer | 2 |
| Q29 | 60 | Ratio · PercentageShort answer | 2 |
| Q30 | 8 cm | Area and PerimeterShort answer | 2 |
Paper 2
17 questions · 17 free final answers · 55 marks listed
| Q | Answer | Topic / section | Marks |
|---|---|---|---|
| Q1 | (a) 9605(b) 5960 | Whole NumbersShort answer | 2 |
| Q2 | 5 | Whole NumbersShort answer | 2 |
| Q3 | 11 | Fractions · RatioShort answer | 2 |
| Q4 | (a) H, F, B(b) 2/9 | Fractions · Data AnalysisShort answer | 2 |
| Q5 | (a) 35(b) 375 | Data AnalysisShort answer | 2 |
| Q6 | (a) 10 00(b) 14 00 to 15 00(c) 7 | Data AnalysisStructured | 3 |
| Q7 | 67 | AnglesStructured | 3 |
| Q8 | (a) $170(b) $212.50 | PercentageStructured | 3 |
| Q9 | (a) 25%(bi) 576(bii) 421.5 | Data Analysis · PercentageStructured | 4 |
| Q10 | $192 | RatioStructured | 3 |
| Q11 | (a) 9 : 13(b) 330 | Ratio · PercentageStructured | 3 |
| Q12 | (a) 11 cm(b) 57 cm² | Area and PerimeterStructured | 4 |
| Q13 | (a) 58(b) 102(c) is; is not; trapezium | AnglesStructured | 4 |
| Q14 | (a) 5/16(b) 432 | Fractions · Whole NumbersStructured | 4 |
| Q15 | (a) Helen, $12(b) 1.026 kg | MeasurementStructured | 4 |
| Q16 | (a) 329.7 cm²(b) 141.88 cm | Area and PerimeterStructured | 5 |
| Q17 | (a) 4.65 ℓ(b) 13/44 | Volume · FractionsStructured | 5 |
PSLE Premium
Got it wrong? See exactly why.
Step-by-step worked solutions for every Maths question, written the way PSLE markers award method marks, plus model answers for open-ended questions. We are adding them newest years first (2025 back to 2021), checked against the answer key on this page.
Paper format and timing: PSLE Maths 2026 exam format (Paper 1 & Paper 2).
Written by
SGSchoolKaki Education Team
Our team of ex-MOE teachers, private tutors and education data analysts brings 16+ years of combined experience.