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Cornerstone · Grades 3–5 Keystones #1 16 May 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 May 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 1⁄8

    Answer: 23⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 25

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Share 70 in the ratio 4:1

    Answer: 56 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 6, 47, 36, 50, 5, 6, 20, 38

    Answer: 26

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