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Cornerstone · Grades 3–5 Keystones #1 27 February 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 6⁄7

    Answer: 25⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x - 12 = 9

    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 78 in the ratio 1:2

    Answer: 26 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 12, 35, 35, 17, 7, 16. Give your answer to 2 decimal places

    Answer: 20.33

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