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Cornerstone · Grades 3–5 Keystones #1 23 February 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 13 = 62

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

    Calculate the hypotenuse when a = 12cm and b = 5cm

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

    Share 64 in the ratio 3:1

    Answer: 48 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 35, 6, 36, 36, 6, 45, 17. Give your answer to 2 decimal places

    Answer: 25.86

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