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Cornerstone · Grades 3–5 Keystones #1 28 February 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 28 February 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 2⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x - 11 = 21

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 4:2:1

    Answer: 96, 48 and 24
  5. 5. Statistics Mean

    Find the mean of: 7, 9, 14

    Answer: 10

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