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Cornerstone · Grades 3–5 Keystones #1 9 April 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 9 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

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

    Solve: 4x - 18 = 14

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 145 in the ratio 2:1:2

    Answer: 58, 29 and 58
  5. 5. Statistics Mean

    Find the mean of: 13, 12, 2, 10, 13

    Answer: 10

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