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Cornerstone · Grades 3–5 Keystones #1 1 August 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 1 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 7 = 41

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:1:2

    Answer: 21, 21 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 36, 42, 41, 17, 24, 29

    Answer: 31.5

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