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

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

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 36

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 12.73cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 4:1

    Answer: 64 and 16
  5. 5. Statistics Mean

    Find the mean of: 13, 13, 20, 10, 10

    Answer: 13.2

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