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Cornerstone · Grades 3–5 Keystones #1 7 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 7 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄6

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 59

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 32, 37, 10, 14, 49, 6, 16. Give your answer to 2 decimal places

    Answer: 23.43

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