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Cornerstone · Grades 3–5 Keystones #1 27 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄4

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 11 = 85

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 1:4

    Answer: 17 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 18, 41, 14, 13, 22, 48, 5

    Answer: 23

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