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

Five GCSE retrieval questions · 5 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄4

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 8 = 104

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Find the mean of: 14, 14, 21, 11

    Answer: 15

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