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Cornerstone · Grades 3–5 Keystones #1 8 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 8 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 1⁄3

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 41

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 3:4:1

    Answer: 36, 48 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 9, 24, 46, 27, 46, 18, 8. Give your answer to 2 decimal places

    Answer: 25.43

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