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Cornerstone · Grades 3–5 Keystones #1 28 August 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 28 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 3 = 38

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Find the mean of: 9, 9, 17, 13, 17

    Answer: 13

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