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Cornerstone · Grades 3–5 Keystones #1 24 September 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 29

    Answer: x = 3
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 10cm

    Answer: 14.14cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics Mean

    Find the mean of: 20, 15, 4, 9, 18

    Answer: 13.2

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