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Cornerstone · Grades 3–5 Keystones #1 17 October 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

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

    Solve: 2x + 7 = 17

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 5cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 200 in the ratio 1:2:2

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

    Find the mean of: 4, 18, 13, 13

    Answer: 12

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