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Cornerstone · Grades 3–5 Keystones #1 8 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 11 = 38

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 27 in the ratio 2:1

    Answer: 18 and 9
  5. 5. Statistics Mean

    Find the mean of: 17, 5, 17, 17

    Answer: 14

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