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Cornerstone · Grades 3–5 Keystones #1 16 July 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 85

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

    Calculate the hypotenuse when a = 10cm and b = 5cm

    Answer: 11.18cm
  4. 4. Ratio Sharing in a ratio

    Share 133 in the ratio 3:4

    Answer: 57 and 76
  5. 5. Statistics Mean

    Find the mean of: 11, 17, 17, 2, 15

    Answer: 12.4

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