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Cornerstone · Grades 3–5 Keystones #1 26 August 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 26 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 1⁄9

    Answer: 4⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 16 = -6

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 2:3:3

    Answer: 30, 45 and 45
  5. 5. Statistics Mean

    Find the mean of: 11, 15, 12, 18

    Answer: 14

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