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Cornerstone · Grades 3–5 Keystones #1 30 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 6⁄7

    Answer: 58⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 7

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 28, 46, 7, 18, 40, 22, 49, 34

    Answer: 30.5

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