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

Five GCSE retrieval questions · 3 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 7⁄8

    Answer: 97⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x - 5 = 51

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 3:1:2

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

    Find the mean of: 8, 12, 15, 18, 7

    Answer: 12

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