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Cornerstone · Grades 3–5 Keystones #1 30 July 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 15

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 18 in the ratio 2:1

    Answer: 12 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 36, 7, 24, 18, 22, 7, 40

    Answer: 22

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