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

Five GCSE retrieval questions · 5 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 49

    Answer: x = 5
  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

    Share 108 in the ratio 1:2

    Answer: 36 and 72
  5. 5. Statistics Mean

    Find the mean of: 3, 12, 3, 11, 21

    Answer: 10

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