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Cornerstone · Grades 3–5 Keystones #1 22 November 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 November 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 4⁄8

    Answer: 9⁄14
  2. 2. Algebra Two-step equations

    Solve: 3x + 12 = 21

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

    Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Share 66 in the ratio 2:1

    Answer: 44 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 17, 11, 17, 6, 50, 8, 36. Give your answer to 2 decimal places

    Answer: 20.71

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