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Cornerstone · Grades 3–5 Keystones #1 14 May 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 May 2021 · mathsvault.uk/keystones

  1. 1. Number

    800000

    Answer: 8 × 105
  2. 2. Algebra

    Collect like terms: 2x + 5y + 8x + 5y

    Answer: 10x + 10y
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 5cm and 12cm

    Answer: 30cm
  4. 4. Ratio

    Find 24% of 310

    Answer: 74.4
  5. 5. Statistics

    A bag has 8 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄11

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