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Cornerstone · Grades 3–5 Keystones #1 1 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 1 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x - 13 = 17

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 16.4cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 1:4

    Answer: 16 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 10, 24, 32, 28, 42, 48. Give your answer to 2 decimal places

    Answer: 30.67

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