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Cornerstone · Grades 3–5 Keystones #1 12 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 12 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 2⁄4

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x + 11 = 65

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

    Calculate the hypotenuse when a = 9cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 3:3:2

    Answer: 51, 51 and 34
  5. 5. Statistics Mean

    Find the mean of: 14, 16, 21, 9, 10

    Answer: 14

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