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Cornerstone · Grades 3–5 Keystones #1 28 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 30

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 3:1

    Answer: 60 and 20
  5. 5. Statistics Mean

    Find the mean of: 19, 18, 7, 4

    Answer: 12

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