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Cornerstone · Grades 3–5 Keystones #1 11 November 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 1⁄12

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 66

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 3:1

    Answer: 39 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 48, 36, 19, 13, 15, 5, 37. Give your answer to 2 decimal places

    Answer: 24.71

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