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Cornerstone · Grades 3–5 Keystones #1 27 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 4⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = -2

    Answer: x = 9
  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

    Share 68 in the ratio 3:1

    Answer: 51 and 17
  5. 5. Statistics Mean

    Find the mean of: 13, 11, 5, 19

    Answer: 12

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