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Cornerstone · Grades 3–5 Keystones #1 16 July 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 2⁄7

    Answer: 3⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x + 11 = 29

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 13, 26, 6, 19, 23, 6, 39. Give your answer to 2 decimal places

    Answer: 18.86

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