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Cornerstone · Grades 3–5 Keystones #1 2 October 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄11 + 5⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x + 10 = 24

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 1:2:4

    Answer: 20, 40 and 80
  5. 5. Statistics Mean

    Find the mean of: 8, 25, 12

    Answer: 15

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