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Cornerstone · Grades 3–5 Keystones #1 31 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 6⁄7

    Answer: 55⁄56
  2. 2. Algebra Two-step equations

    Solve: 7x + 6 = 62

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 1:1:3

    Answer: 30, 30 and 90
  5. 5. Statistics Mean

    Calculate the mean of: 43, 17, 45, 14, 48, 5, 9, 31

    Answer: 26.5