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Cornerstone · Grades 3–5 Keystones #1 22 September 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 22 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄8

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 8x - 5 = 83

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 15.23cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 1:2:2

    Answer: 30, 60 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 35, 50, 27, 40, 49, 43, 24, 10

    Answer: 34.75

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