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Cornerstone · Grades 3–5 Keystones #1 20 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄11 + 2⁄11

    Answer: 3⁄11
  2. 2. Algebra Two-step equations

    Solve: 8x - 18 = 14

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 125 in the ratio 3:1:1

    Answer: 75, 25 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 42, 27, 12, 39, 46, 20, 44, 40

    Answer: 33.75

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