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Cornerstone · Grades 3–5 Keystones #1 16 September 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 16 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 1⁄6

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

    Solve: 8x - 8 = 24

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 1:2

    Answer: 24 and 48
  5. 5. Statistics Mean

    Find the mean of: 19, 3, 8

    Answer: 10

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