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Cornerstone · Grades 3–5 Keystones #1 25 August 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 August 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

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

    Solve: 2x - 5 = 25

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 3:1:3

    Answer: 60, 20 and 60
  5. 5. Statistics Mean

    Find the mean of: 19, 5, 8, 12

    Answer: 11

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