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Cornerstone · Grades 3–5 Keystones #1 28 May 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 May 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄9 + 6⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 8x - 5 = 27

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 1:2:4

    Answer: 20, 40 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 37, 34, 33, 38, 39, 32

    Answer: 35.5

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