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Cornerstone · Grades 3–5 Keystones #1 10 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

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

    Solve: 3x + 6 = 24

    Answer: x = 6
  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 80 in the ratio 1:3

    Answer: 20 and 60
  5. 5. Statistics Mean

    Find the mean of: 16, 8, 9, 6, 6

    Answer: 9

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