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Cornerstone · Grades 3–5 Keystones #1 11 August 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 111

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

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio Sharing in a ratio

    Divide 88 in the ratio 1:3:4

    Answer: 11, 33 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 16, 18, 24, 16, 22, 26

    Answer: 20.3

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