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Cornerstone · Grades 3–5 Keystones #1 10 September 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 September 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 1⁄3

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 8x - 10 = 38

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 4cm

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Divide 121 in the ratio 3:4:4

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

    Calculate the mean of: 9, 8, 8, 13, 50, 5

    Answer: 15.5

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