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

Five GCSE retrieval questions · 1 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

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

    Solve: 8x - 16 = 64

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 210 in the ratio 4:1:2

    Answer: 120, 30 and 60
  5. 5. Statistics Mean

    Find the mean of: 15, 15, 13, 9, 3

    Answer: 11

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