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Cornerstone · Grades 3–5 Keystones #1 16 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 4

    Answer: x = 8
  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

    Divide 60 in the ratio 1:3:2

    Answer: 10, 30 and 20
  5. 5. Statistics Mean

    Find the mean of: 20, 19, 20, 3, 3

    Answer: 13

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