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Cornerstone · Grades 3–5 Keystones #1 19 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 4⁄11

    Answer: 7⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x - 9 = 26

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

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

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

    Share 32 in the ratio 3:1

    Answer: 24 and 8
  5. 5. Statistics Mean

    Find the mean of: 2, 3, 18, 20, 7

    Answer: 10