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Cornerstone · Grades 3–5 Keystones #1 30 November 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 30 November 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 6 = 42

    Answer: x = 9
  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 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 31, 24, 18, 47, 10, 20, 11

    Answer: 23

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