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Cornerstone · Grades 3–5 Keystones #1 29 September 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 29 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 3⁄4

    Answer: 23⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 39

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

    Calculate the hypotenuse when a = 6cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 12.53cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 2:1:1

    Answer: 36, 18 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 15, 10, 17, 9, 32, 20. Give your answer to 2 decimal places

    Answer: 17.17

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