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

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

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 1⁄11

    Answer: 6⁄11
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 36

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 3:1

    Answer: 51 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 10, 21, 29, 21, 20, 10

    Answer: 18.5

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