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Cornerstone · Grades 3–5 Keystones #1 10 November 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄6

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

    Solve: 3x - 9 = 36

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 2:2:1

    Answer: 84, 84 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 29, 35, 9, 29, 45, 14. Give your answer to 2 decimal places

    Answer: 26.83

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