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Cornerstone · Grades 3–5 Keystones #1 30 September 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄7

    Answer: 13⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 40

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 9cm

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 12, 10, 25, 44, 49, 26, 21

    Answer: 26.7

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