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Cornerstone · Grades 3–5 Keystones #1 5 May 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 May 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 90 + 47

    Answer: 90 + 47 = 137
  2. 2. Algebra

    For y = x³ + 11, calculate y when x = 4

    Answer: y = 75
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Calculate 25% of 67

    Answer: 16.75
  5. 5. Statistics

    What is the probability of rolling a 6 on a fair die?

    Answer: 1⁄6

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