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Cornerstone · Grades 3–5 Keystones #1 1 October 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 4⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 31

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 10.3cm
  4. 4. Ratio Sharing in a ratio

    Share 27 in the ratio 2:1

    Answer: 18 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 42, 19, 43, 30, 16, 45, 6, 6. Give your answer to 2 decimal places

    Answer: 25.88

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