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Cornerstone · Grades 3–5 Keystones #1 28 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 2⁄4

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 45

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 1:4

    Answer: 16 and 64
  5. 5. Statistics Mean

    Find the mean of: 16, 17, 10, 10, 7

    Answer: 12

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