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

Five GCSE retrieval questions · 7 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄3

    Answer: 31⁄24
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 51

    Answer: x = 8
  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

    Share 64 in the ratio 1:3

    Answer: 16 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 44, 24, 22, 11, 28, 20. Give your answer to 2 decimal places

    Answer: 24.83

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