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Cornerstone · Grades 3–5 Keystones #1 2 November 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

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

    Solve: 8x - 20 = 52

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 153 in the ratio 3:4:2

    Answer: 51, 68 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 37, 47, 13, 36, 15, 23

    Answer: 28.5

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