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Cornerstone · Grades 3–5 Keystones #1 9 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 6⁄7

    Answer: 69⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 20

    Answer: x = 10
  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 150 in the ratio 3:2:1

    Answer: 75, 50 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 43, 25, 30, 36, 20, 11

    Answer: 27.5

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