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Cornerstone · Grades 3–5 Keystones #1 15 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 15 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 3⁄4

    Answer: 19⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 53

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 10, 48, 47, 29, 7, 34, 19, 35. Give your answer to 2 decimal places

    Answer: 28.63

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