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Cornerstone · Grades 3–5 Keystones #1 8 March 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 March 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 2⁄3

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 30

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Share 84 in the ratio 1:2

    Answer: 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 33, 9, 19, 23, 5, 38, 27, 10

    Answer: 20.5

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