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Cornerstone · Grades 3–5 Keystones #1 31 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 6⁄8

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 21

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 28 in the ratio 1:3

    Answer: 7 and 21
  5. 5. Statistics Mean

    Find the mean of: 16, 10, 4, 18, 22

    Answer: 14

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