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Cornerstone · Grades 3–5 Keystones #1 20 September 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 September 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 1⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 12

    Answer: x = 3
  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 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 50, 37, 31, 28, 22, 31, 24

    Answer: 31.9

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