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Cornerstone · Grades 3–5 Keystones #1 4 May 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 May 2023 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 275 + 450

    Answer: 275 + 450 = 725
  2. 2. Algebra

    For y = x³, find y when x = 2

    Answer: y = 8
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 13cm and 15cm

    Answer: 97.5cm²
  4. 4. Ratio

    Simplify: 6:6:8

    Answer: 3:3:4
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

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