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Cornerstone · Grades 3–5 Keystones #1 9 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 5⁄7

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x - 11 = 9

    Answer: x = 5
  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 126 in the ratio 4:3

    Answer: 72 and 54
  5. 5. Statistics Mean

    Find the mean of: 8, 8, 8, 18, 3

    Answer: 9

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