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

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

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 3⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 42

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

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

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

    Divide 150 in the ratio 4:3:3

    Answer: 60, 45 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 22, 45, 31, 14, 39, 41

    Answer: 32

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