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Cornerstone · Grades 3–5 Keystones #1 3 July 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 21

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

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 152 in the ratio 4:3:1

    Answer: 76, 57 and 19
  5. 5. Statistics Mean

    Find the mean of: 8, 14, 20

    Answer: 14

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