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Cornerstone · Grades 3–5 Keystones #1 4 January 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 January 2022 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 342 + 658

    Answer: 342 + 658 = 1000
  2. 2. Algebra

    Expand: 2(6x + 4)

    Answer: 12x + 8
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Simplify the ratio 18:6

    Answer: 3:1
  5. 5. Statistics

    A bag has 7 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄11

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