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Cornerstone · Grades 3–5 Keystones #1 22 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x - 10 = 80

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 1:3:2

    Answer: 30, 90 and 60
  5. 5. Statistics Mean

    Find the mean of: 7, 15, 2, 20, 16

    Answer: 12

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