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Cornerstone · Grades 3–5 Keystones #1 17 November 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 17 November 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x + 12 = 28

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 136 in the ratio 3:4:1

    Answer: 51, 68 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 46, 8, 20, 35, 33, 20

    Answer: 27

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