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Cornerstone · Grades 3–5 Keystones #1 21 August 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 21 August 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 1⁄4

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 6x - 15 = 39

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 3:1

    Answer: 45 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 24, 49, 10, 42, 10, 35. Give your answer to 2 decimal places

    Answer: 28.33

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