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Cornerstone · Grades 3–5 Keystones #1 10 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = -3

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 126 in the ratio 4:3

    Answer: 72 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 27, 31, 30, 36, 18, 27, 43. Give your answer to 2 decimal places

    Answer: 30.29

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