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Cornerstone · Grades 3–5 Keystones #1 25 March 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 25 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 12 = 36

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:1:4

    Answer: 28, 28 and 112
  5. 5. Statistics Mean

    Find the mean of: 22, 16, 10, 12

    Answer: 15

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