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Cornerstone · Grades 3–5 Keystones #1 8 January 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 29

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:4

    Answer: 12 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 13, 27, 21, 17, 34, 8, 11. Give your answer to 2 decimal places

    Answer: 18.71

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