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Cornerstone · Grades 3–5 Keystones #1 28 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 28 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄8 + 1⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 21

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

    Calculate the hypotenuse when a = 4cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 11.7cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 1:3

    Answer: 6 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 24, 12, 32, 11, 5, 36, 36, 41. Give your answer to 2 decimal places

    Answer: 24.63

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