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Cornerstone · Grades 3–5 Keystones #1 5 September 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 5⁄7

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 2x + 4 = 20

    Answer: x = 8
  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

    Divide 189 in the ratio 2:1:4

    Answer: 54, 27 and 108
  5. 5. Statistics Mean

    Find the mean of: 20, 12, 16, 11, 16

    Answer: 15

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