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Cornerstone · Grades 3–5 Keystones #1 24 September 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 24 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 1⁄8

    Answer: 15⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 35

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 1:2

    Answer: 18 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 44, 37, 27, 46, 46, 37, 27. Give your answer to 2 decimal places

    Answer: 37.71

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