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Cornerstone · Grades 3–5 Keystones #1 11 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 8⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x + 10 = 50

    Answer: x = 10
  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 4:1

    Answer: 80 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 48, 27, 24, 11, 33, 43

    Answer: 31

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