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Estimation: OCR GCSE Maths questions

Every OCR GCSE Maths exam question on N14 Estimation, 2017–2025, with its mark scheme and examiner’s report.

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921 questions

  1. Q11

    June 2025 · Paper 5

    5 marksN14 EstimationR11 Compound units: speed, density and pressure
    The whole paper ↗
    June 2025 Paper 5, question 11: A solid steel cube has a mass of 1.05 kg. The density of the steel is 7.9 g/cm3. Orla says, The length of one side of the cube is approximately 10 cm. Use estim

  2. Q12

    November 2024 · Paper 5

    4 marksR11 Compound units: speed, density and pressureN14 Estimation
    The whole paper ↗
    November 2024 Paper 5, question 12: A housing estate is built on a triangular piece of land. Not to scale 1.96 km 5.03 km There are 3951 people living on the estate. 2. Work out an estimate of the

  3. Q6

    June 2024 · Paper 5

    3 marksN14 EstimationR11 Compound units: speed, density and pressure
    The whole paper ↗
    June 2024 Paper 5, question 6: A bronze ornament has a volume of 198 cm 3. The density of bronze is . g/cm 8 9 By rounding each value correct to one significant figure, work out an estimate f

  4. Q2

    November 2023 · Paper 5

    2 marksN14 Estimation
    The whole paper ↗
    November 2023 Paper 5, question 2: By writing each number correct to 1 significant figure, find an estimate for this calculation. 486 101 2 .

  5. Q8

    June 2023 · Paper 5

    5 marksN14 EstimationR11 Compound units: speed, density and pressure
    The whole paper ↗
    June 2023 Paper 5, question 8: A block made of iron is in the shape of a cuboid. The block is 3.1 cm by 4.9 cm by 2.2 cm. The density of iron is 7.87 g / cm3. Sam thinks that the mass of the

  6. Q7

    June 2022 · Paper 5

    7 marksN14 EstimationA2 Substitution
    The whole paper ↗
    June 2022 Paper 5, question 7: Harper rounds each value to 1 significant figure. Harper uses the rounded values and the formula 1 2 s ut at = + 2 to estimate the distance travelled in the 10.

  7. Q10

    November 2021 · Paper 5

    4 marksR11 Compound units: speed, density and pressureN14 Estimation
    The whole paper ↗
    November 2021 Paper 5, question 10: Force is measured in newtons (N). A force of 198.5 N is applied to a rectangular surface of length 4.9 cm and width 4.1 cm. Work out an estimate of the pressure

  8. Q4

    November 2020 · Paper 6

    7 marksN14 EstimationN15 Rounding and error intervals
    The whole paper ↗
    November 2020 Paper 6, question 4: Nina estimates the value of 0 546 . 220 # (a) Show that Nina’s answer is 64. (b) Calculate the error in her estimated answer as a percentage of the exact answer

  9. Q1

    November 2019 · Paper 5

    5 marksN14 EstimationN2 The four operations
    The whole paper ↗
    November 2019 Paper 5, question 1: (a) Work out. 3 1 4 + 6 Give your answer in its simplest form. (a) (b) By writing each number correct to 1 significant figure, use estimation to show that 39 6

  10. Q2

    November 2018 · Paper 5

    3 marksN14 Estimation
    The whole paper ↗
    November 2018 Paper 5, question 2: By writing each number correct to 1 significant figure, find an estimate for this calculation. 606 3 . 0 312 . # 19 93 .

  11. Q3

    November 2018 · Paper 6

    5 marksN9 Standard formN14 Estimation
    The whole paper ↗
    November 2018 Paper 6, question 3: A newborn baby has an approximate mass of 3.5 kilograms. A human cell has an approximate mass of 2.7 × 10–11 grams. Use these values to estimate the number of h

  12. Q3

    June 2018 · Paper 6

    3 marksN14 Estimation
    The whole paper ↗
    June 2018 Paper 6, question 3: 4 . - # 3 Asha worked out . 59 4 . She got an answer of 19.5, correct to 3 significant figures. Write each number correct to 1 significant figure to decide if A
All 12 questions on Estimation, as a list
  1. June 2025, Paper 5, Q11 (5 marks): A solid steel cube has a mass of 1.05 kg. The density of the steel is 7.9 g/cm3. Orla says, The length of one side of the cube is approximately 10 cm. Use estim
  2. November 2024, Paper 5, Q12 (4 marks): A housing estate is built on a triangular piece of land. Not to scale 1.96 km 5.03 km There are 3951 people living on the estate. 2. Work out an estimate of the
  3. June 2024, Paper 5, Q6 (3 marks): A bronze ornament has a volume of 198 cm 3. The density of bronze is . g/cm 8 9 By rounding each value correct to one significant figure, work out an estimate f
  4. November 2023, Paper 5, Q2 (2 marks): By writing each number correct to 1 significant figure, find an estimate for this calculation. 486 101 2 .
  5. June 2023, Paper 5, Q8 (5 marks): A block made of iron is in the shape of a cuboid. The block is 3.1 cm by 4.9 cm by 2.2 cm. The density of iron is 7.87 g / cm3. Sam thinks that the mass of the
  6. June 2022, Paper 5, Q7 (7 marks): Harper rounds each value to 1 significant figure. Harper uses the rounded values and the formula 1 2 s ut at = + 2 to estimate the distance travelled in the 10.
  7. November 2021, Paper 5, Q10 (4 marks): Force is measured in newtons (N). A force of 198.5 N is applied to a rectangular surface of length 4.9 cm and width 4.1 cm. Work out an estimate of the pressure
  8. November 2020, Paper 6, Q4 (7 marks): Nina estimates the value of 0 546 . 220 # (a) Show that Nina’s answer is 64. (b) Calculate the error in her estimated answer as a percentage of the exact answer
  9. November 2019, Paper 5, Q1 (5 marks): (a) Work out. 3 1 4 + 6 Give your answer in its simplest form. (a) (b) By writing each number correct to 1 significant figure, use estimation to show that 39 6
  10. November 2018, Paper 5, Q2 (3 marks): By writing each number correct to 1 significant figure, find an estimate for this calculation. 606 3 . 0 312 . # 19 93 .
  11. November 2018, Paper 6, Q3 (5 marks): A newborn baby has an approximate mass of 3.5 kilograms. A human cell has an approximate mass of 2.7 × 10–11 grams. Use these values to estimate the number of h
  12. June 2018, Paper 6, Q3 (3 marks): 4 . - # 3 Asha worked out . 59 4 . She got an answer of 19.5, correct to 3 significant figures. Write each number correct to 1 significant figure to decide if A

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